that is really cool do you have alink to those electrical connectors?

You can get them lots of places.  Just search for CCTV DC Power connectors:

http://dx.com/p/male-female-dc-power-co … u8Z3Pto99Q

http://www.ebay.com/itm/5SETS-New-CCTV- … 19cf13020e

Recently, my mk5 failed when the spring loaded tension arm screw tore out of it holder after repeatedly having to remove a failing hotend to clear up clogs.

As a result, I decided to create my own jigsaw replacement in openSCAD, replicating much of the mk5 but adding features I'd like to see, including a new tension mechanism.  I'd like to share my results.

I added a flip-up quick-release latch for the tension arm, and beefed-up all the hinge pivot points for strength. I also added an optional swinging mount for a small 25mm peek-assembly cooling fan.  Lastly, I decided to replace the flimsy hotend electrical connectors with screw-on coax power connectors used for security cameras, and added an optional bracket to hold these connectors and make the package neat and tidy:

Here is a link to the models on thingiverse:

http://www.thingiverse.com/thing:239703

And attached is a video of the quick release in action.