TenOunce Tone
tony
Ok I was in the Man Lab and saw a CD Container sitting on the bench, as there are a few going through the process of building an underwater viewer scope, I had a think and come up whti this way to help cut the viewing window.
In the first pic you will see the viewer parts. Note the 100 mm pvc pipe is not in pic, we all know what that looks like.
Anyway, the grey item with the black grid is the water drain that fits over the top, the other grey item is the base of a CD spindle, the clipboard is the $1.99 clear plastic clipboard from Office works.
in the second picture you will notice the CD Spindle sitting in the top of the PVC Drain, perfect fit, there is about 1 or 2 mm gap all round.
Pic three is the CD Spindle on top of the clipboard, mark around the spindle with marker of your choice, try to use something with a thin line. cut along the line with your cutter of choice, I will be using my Dremel, you can use a bandsaw, or anything that will cut the circle, just take it easy when cutting and keep the plastic supported so it dont vibrate or wobble too much and you should be right.
I guess the rest is silicon the window into the drain attach to your chosen length of pipe and away you go.
Total cost so far is piece of 100mm pipe $9.00, Drain cover $3.50 or so. Clipboard $1.99, CD Spindle, $0.00 had it from years ago..
Also if you cant find some plastic, you could cut the top out of the CD Spindle and glue that in, not a flat surface but it would work I guess.
Update to follow on assembled product.
Cheers, Tone
In the first pic you will see the viewer parts. Note the 100 mm pvc pipe is not in pic, we all know what that looks like.
Anyway, the grey item with the black grid is the water drain that fits over the top, the other grey item is the base of a CD spindle, the clipboard is the $1.99 clear plastic clipboard from Office works.

in the second picture you will notice the CD Spindle sitting in the top of the PVC Drain, perfect fit, there is about 1 or 2 mm gap all round.

Pic three is the CD Spindle on top of the clipboard, mark around the spindle with marker of your choice, try to use something with a thin line. cut along the line with your cutter of choice, I will be using my Dremel, you can use a bandsaw, or anything that will cut the circle, just take it easy when cutting and keep the plastic supported so it dont vibrate or wobble too much and you should be right.

I guess the rest is silicon the window into the drain attach to your chosen length of pipe and away you go.
Total cost so far is piece of 100mm pipe $9.00, Drain cover $3.50 or so. Clipboard $1.99, CD Spindle, $0.00 had it from years ago..
Also if you cant find some plastic, you could cut the top out of the CD Spindle and glue that in, not a flat surface but it would work I guess.
Update to follow on assembled product.
Cheers, Tone