[z_beeblebrox]

Originally Posted by fb39ca4

Is your chassis held together entirely with T-slots? We thought those would not be strong enough, so we use wood glue for everything. It probably helps that you are using 1/4" plywood, rather than 3/16".

Everything is held together with t-slots.

Originally Posted by asid61

How small is "a hair smaller" for wood?

We've experimentally found that cutting the bearing holes .006" undersize compensates for kerf and gives a pretty tight fit. I imagine that this number varies with laser model and material.