Leap Frog Creatr “Lubrication Egg” for printing PLA

One of the most bugging problems of the Creatr is that the printing head is just about too weak to print PLA out-of-the-box. Interestingly, adding a tiny bit of WD40 lubricant solves the problem. The most common solution was to use a Kinder chocolate egg filled with a sponge soaked in WD40 attached right above the printing head. Suffices to say that an object that big is not really what you would like to move around with the head. I also didn’t like the alternative of putting the egg before the filament guide, because I don’t want the WD40 in there. So I designed a small clip-on solution to the problem. Just print it with ABS, crumple up some sponge or paper towel (toilet paper will do as well) and fiddle it into the clip, soak the paper with wd40 (doesn’t require too much) and clip it onto the printing head (careful, it is quite snug at the beginning, it best works by hanging in the first clip first and then rotating it around it.). Now it prints PLA as if there never has been a problem.

Lubricator attached!

STL, SCAD and SolidPython file: lubricator

Leapfrog Creatr Filament Guide

In our lab, we have a leapfrog creatr. And while the overall build quality is robust, it is very beta at some places. The filament enters below the build platform but the entries’ borders are too sharp, scraping some parts off the filament. These simple addons remedy the problem. Add, print and forget. (I didn’t fix them to the printer in any way, they stay in place on their own.)

Filament Guide für Leapfrog Creatr

scad-File stl-File



Another great tool from my current home town: Wunderlist. While you will find many good reviews and intros in the web, it missed an Alfred extension to be really useful. Therefore, I created one.

Disclaimer: It is still a bit raw, and I might not find time to improve on it soon.


To use it you need to edit the file wunderfred.py in the workflow, there is a line that you need to edit your login credentials to:

       w = Wunderlist("email","password") #<<< Add login credentials here!

It has 3 commands.


wlup – updates the cached list (takes a while)

wl – lists the tasks filtered by whatever you type after the keyword. If you select a task and hit enter, it will be marked completed.

wla – adds a new task to the list you select by searching. whatever is after the : will be written to the task



CC BY-SA 3.0
Any feedback or bug reports are highly appreciated!

Credits: Based on the reverse engineering and code done by bsmt: http://bsmt.me/blog/…wunderlist-api/

Skype for Alfred

UPDATE: 4.8.2014 – Skype decided that having a Desktop API isn’t good for their customer experience anymore. Hence this plugin will no longer work, I’m sorry.


If you are using OSX and don’t know Alfred, you are definitely missing out. This is by far the most useful tool and the main reason, I currently favour OSX over Windows and Linux. If you have the PowerPack Alfred allows for custom plugins and that’s where all the fun begins. My first plugin gives you the ability to Skype from within Alfred.

Skype needs to be running for this to work. You should receive a warning from skype, that a programm wants to access its data – accept.

s – autocompletion from skype contact list, then send message. Also displays last received message.
sc – autocompletion from skype contact list, call users.
snew – the 5 newest messages, simply select one for reply.
sr – reply to last user.

There is a Contact Action for using the alfred contacts to call skype, simply create a new Contact Action as described here http://support.alfre…-contact-action and select “Call Skype”, if you have saved skype usernames in your contacts as well, they should work too.


Alfred, Skype, Python (preinstalled in OSX)



Known Issues:

  1. When you hit enter too fast, a few letters can be cut off. I have optimised what is possible to remedy this, to completely remove it, a feature change in Alfred is necessary. Simple fix, add a space after your message.
  2. does not work with group conversations
  3. < > ” don’t work.

Wishlist/TODO: (decreasing importance)

  1. Filter empty Messages. (i.e. if they contained call information that is filtered already)
  2. Find user image
  3. sr without autcomplete
  4. Display status for the users with icon (maybe, if you know a good way to compose images without using libraries that need installation let me know…)
  5. More sanity checks: Was update successful, if it fails, why? etc.
  6. Clean XML replies from Smilies code etc.
  7. sr – directly reply to last person. 
  8. alt opens the chat window. (can’t switch current window, but bring skype to front)
  9. Call skype # from adress book.


v0.3 (http://d.pr/f/cimZ)

  • sr now directly replies, without autocomplete
  • fetches all user images completely
  • shows user status on search, snew, etc.
  • buxfixes for encoding, snew, …
  • more caching, faster response.

v0.2 (http://d.pr/f/FcIO)

  • Display the history of a chat when replying.
  • New Command sr, to directly reply to a user.
  • If you use sc with an unknown username or directly a phone number, it suggests calling as well as updating the friends list. (must have accidentially removed this, will be back.)
  • Encoding works properly v2 ;)
  • Open Skype with alt/enter.

v0.1.1 (http://d.pr/f/RGTo)

  • Skype startup bug removed
  • More debugging
  • Encoding works properly
  • snew for newest messages
  • Contact Action to allow calling from contacts.


  • Initial release

CC BY-SA 3.0
Any feedback or bug reports are highly appreciated!