You could always try something different. There was a few scientists experimenting with Mylar and water to make a telescope!
What they did was dug a hole in the ground (you could make a frame instead) covered it with Mylar, then placed a diagonal and focuser about 1 metre above it. Then they added water drop by drop until the mirror had the right curve in it to pull focus in the EP!!!!!
They didn't expect it to work very well but it did
Must be able to google something about it
