Why does the BOM link to 8560K257 (described as 1/8" acrylic) for the 1/4" acrylic? In BOM 2.5 (and carried forward into 2.6) this item was changed from 8560k355 (actually sized as 6mm acrylic). What's going on here?
Excellent catch- our mistake! The real part should be (as you say)
I'm not sure what happened there, but I've made the correction in both the 2.6 and 2.5 BOMs.