Original Prusa MINI E3D Standard Heater Block - X-Carriage R4

X-Axis Carriage for standard E3D Heater Blocks. Changed the air duct so it won't blow on the edge of the square heater block.

This is the latest and original R4 (Revision 4) of their X-Carriage. But modified the Fan Duct so you can use standard E3D Heater Blocks.

I will release one later that's better than the stock one under the name RC-1

I noticed in the source files that the engineers at Prusa can't create mechanical parts at all the files are a damn mess and you cannot work with it or easily change things. It's really sad to see... and for them it's also really hard to do revisions internally because its infested with 50+ features and a bunch of useless extrusions and pointless sketches...