SIDO Crate Caster Wheel Feet

I needed to be able to wheel my SIDIO crates around. Came up with a model that uses 1 inch casters off Amazon and M3 SHCS or BHCS. Originally only had Medium Crates. Ended up adding small and large sizes too. 
Printed so far in PLA ABS PA and PETG, can't really tell any difference. 

Recommend printing one and if the fit is not tight enough for your material or your printer is different than mine scale by +/- 1%. Once you get the fit dialed in, print away. 

You can either tap the plastic and thread in M3 screws which seems to work fine, or use a M3 nut and thread into the nut for more strength (my preference). I've put quite a few together, when you back bolt them with the M3 nut and screw you really only need 2 corners for each wheel. 

Link to the casters:

https://www.amazon.com/dp/B07D7VGR1F?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1