12mm Belt Mount Kobra max upgrade

you will need to print 4 belt mounts which will attach to the Y carriage for the linear rail mod.

You will need to insert (3x) m3 heat inserts into each mount

print 4 belt clamps and see the picture for the belt path

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You can purchase some tensioners and modify them to accept 12mm pulleys 

mount the tensioners to 2 new 2040 x 400mm extrusion pieces

or

you can manufacture some, i will publish the files in a new upload