This is a rough version. Please make changes as see fit. I was given the dimensions of the Kossel Clear mounting plate via email and from that I created this adapter.

It should be able to adapt 1.75 and 3mm Pico (Bowden Groovemount version) to the Kossel Clear. I'm not sure if you can use Kossel Clear's PTC fittings, but Pico's Bowden Groovemount threads are for M5 PTC fittings (for Pico 1.75mm) and 1/8 NPT and BSP PTC fittings (for Pico 3mm)

Pico's Bowden Groovemount and STL parts can be found here for testing: http://www.thingiverse.com/thing:204929

and fittings purchased here: http://www.b3innovations.com/

Thanks to this helpful Google group: https://groups.google.com/forum/#!topic/kossel-clear/C8jXEqR8750