It holds 11 with the same number of arm+1 and 2 legs.

If it gets set to a weird scale in your slicer then should scale so its 4mm to 3.8 depending on your tolerance.

Staggering doesn't work that well cause the struts but all it mean is that every odd ones a bit higher, and I now tested with three for a week/month idk time escapes me!

The back plate 22cm you can squash the height of the back a little if that the same size of you plate.

Could it have been done better probably but its better than last time.

Also prob could be lazer cut out of 4mm stuff but I can't test that.