CoreXY Ender3 Style Hotend Mount

I was looking to re-use an ender 3 MK8 extruder to test a dual bowden setup and came up with this x axis carriage, thought it might be useful to others.

The belt tensioner caps are the originals from the CoreXY frame design: https://www.thingiverse.com/thing:2138286. I also included printable extruder spacers you can print those or use 4.5mm of washers to get the correct spacing for the extruder mount.

Bolt pattern on the carriage is for a MGN12C linear rail block.