Hey, i bought your item, received it, watched your video tutorial as well for assembling it..have some feedback for you.
1. Aside from the usual cleanup required, I would suggest M3 x 8mm to 10mm screws.
2. A pilot hole of about 2mm for the screws (combiner port) should be designed, if not it should be drilled before fastening the screws
3. The spots for cleaning up can be reduced, if you could reduce the width of the clip by 0.5mm(not sure if thats possible, but i had to shave off quite abit before i can get the combiner port to fit properly.
4. The round post which the combiner port swivels on is super tight, until i could not fit the encasing pieces for the combiner port.