edit 260318: There was my mistake from pipe sizing from original thing. Anyways, original or my scaled down version, does not work with my glasses :(
Original thing was instructed to use 1" PVC pipe, but comments told that parts are huge and i measured that hole for pipe was ~35mm, it shoud be ~25.4mm.
So, i scaled both parts down to 74.5% from original size, now hole is ~26mm.
I don't have access to 1" pipes (we have here only metric pipes), so i can't confirm how it fits in real life :(
There is small section for you, to try how pipe fits, print that first!
Please, let me know how fitting goes.
You may play with settings