Hello Bob, and welcome to the forum - you'll have a lot in common with Steve Ostler (his user name is panrock) here on this forum as he attempted a 120-line colour 'Mirror Screw' monitor a year or two ago.
I'm sure will give you some tips as a result of his experience. The thread which details the build is entitled, "Starting at the beginning with Mirror Screws" in this NBTV section. This (I hope) is the link for it...
viewtopic.php?f=1&t=1379I also reduced the size of the photo above such that it shows on most displays without having to be downloaded. I have left the original intact.
Steve A.