T-slot M3 nut insert

I wanted to mount my linear guide rails to a 2020 aluminum extrusion but I found the rails have M3 mounting holes so I made these inserts for the extrusion. They accept M3 nuts.

V1 - 50mm length, can take 2 nuts separated by 1 inch.
V2 - 10mm length, can take 1 nut.