Just in case you need this info, here it is:
To cut a hole in a Vision:
Using a compass, draw a circle just a little larger than the dome reflector bottom. Drill a hole for jigsaw-blade access. Then use a jigsaw with a fine-tooth blade meant for plastics or paneling, and carefully cut. That plastic cuts like butter, so be careful not to slip or let the jigsaw run away from you.
You may also use a router and circle guide to cut the hole, or a rotary cutting tool, etc.
To rivet screen:
Get a rivet tool that does 1/8" dia rivets. You'll need medium length or long length (I forgot with Visions. On my other cages that are 1/8" thick, the medium rivets are fine. Visions are thicker, so you may need the long.) You'll need some 1/8" washers sold for riveting on the screen side so the rivets don't pull right thru the screen. Practice one or two rivets on the scrap piece of plastic you just cut out for the hole. Use the rivet tool on the plastic side, and the bottom of the rivet on the screen side.
For screen, I used the 1/8" square hardware cloth.
-----
Mark G
"Sweaterboxes are boring"