Fly Bug,
Here is the link for the technique.
http://modelairplanenews.com/how_to/cowl.asp
Yesterday on my way home from work I picked up one of those flavored water drinks[:'(] just to get the bottle. This bottle was hour glass shaped. Exactly what I needed to get a good canopy. I cut the bottle in half and used the piece that had the bottle opening. I shoved my balsa canopy plug in it and wedged balsa under the plug so that the plug fit really tight in the bottle half. I got out my heat gun and presto a nice little canopy. Here are some pics of how it turned out. This one is a keeper. I began covering last night and encountered a set back. The stringers used in the rear of the fuselage flexed to much as the covering was tightened up and the result was wrinkles galore[>:]. So tonight I am going to take Ptulmers advice and cut out all the stringers and simply sheet the rear with 1/32" balsa. I should of done this in the beginning.[:'(].
Hec