Remix Yet another VR gun stock, work in progress, need help.

The user who designed this has not responded since 2022. I only have tinkercad so I can only do so much. I prefer this model for valve index users. If someone who has more of a cad skill can finish this project that would be awesome. I made the pegs for the rails. He originally had the rail mounts that only accepted circles and I modified them to be octagon. I made each side on the pegs .15mm, on two side, smaller then the hole. I also added a finger grove on the pin to make it easier to remove them. I think this is the correct sizing but im still learning as I have only had a 3D printer for 3-4 months. we still need to make pins to assemble the brace as those are circles.