I have made --maybe 10-15 covers. I have not made any in the last few years. I have a sailrite machine but I use my Consew 206-rb. I have made boom cover sail covers for Cape Dorys on the sailrite but never an Ensign full cover. The machine can do it, but the heavier commercial machine is easier.
I have a template somewhere. It may take me a bit to dig it up. But I am happy to share. My template is only the fore and aft panels. The boom cover portion is a rectangle. It needs to be the length the boom (11' 3"-- i think) and then the length from the center of the boom down will depend on how high you you keep your boom on the mast--generally about 55"-- dont forget a 1" seam allowance where you join material and a 4" hem allowance along the bottom edge (provides extra bulk for stability and to install fastners).
I have a source for sunbrella seconds, contact me and I will give you my source. I like to use lighter material than some folks. Depending --it may not last a long-- I will just make another. I have found even light material will last about 5 years provided you use uv thread. DO NOT scrimp on your thread or you cover will come apart quickly.
I use lighter material because it is easier to work with at the sewing machine and it is easier to handle and stow on the boat. The heaviest material I use is sunbrella marine 60" width. I use zippers in the front and back. Ensign Spars makes my clips. If you are handy, you can probably make your own out of pvc pipe. My husband just does not want to make them for me and I don't use a saw. You will need a tool to install the twist fastners. It takes about 10 yds of material to make a full cover. I use #10 jacket zippers. If you can get your material for $15 per yd, your zippers about $3 ea and fastners about $10 total-- So you can make a cover for less than $200. It is very rewarding to make your own cover. Good luck!
Fran Trapp
fran.trapp25@gmail.com