Hello friends:
I cut the 4 "pvc tubes in half, making small curves.
I placed the pattern inside the tube (centered on the curvature that serves as a support) and fixed it with adhesive glue and transparent adhesive tape.
I made the cut with manual bow.
I used Blade N ° 5
I sanded all burrs after cutting.
I made 3 pieces of agglomerate with melamine (6mm)
Two of them for the base, making a hole for the cable entry and socket for focus.
The last I made a cut of 1 cms around the perimeter.
Once I got everything ready, I glued the base and the top ring with quick glue.
I hope I have explained well, greetings to all.