Tarantula Dual Y spacers +4.5mm

These are spacers for the double Y upgrade by Colindo. I have made them 4.5mm taller to work with Thingirob's corner brackets and reduced their bulk a little.

EDIT: I have uploaded a version with thicker walls as per request. The thicker walls are for 10mm length M4 bolts rather than the 8mm M4 bolts I used.