Definitely look into the tripler approach. My CT-100 is running that way, since mine came with a bad flyback and I was not able to find a source for a replacement. See here:
http://videokarma.org/showthread.php?t=260010
Basically, you remove enough of the HV winding to eliminate any possible shorts or arcs (also OK to simply completely remove it), and the tripler connects to the top of the primary of the flyback -- same place as where the anode of the horizontal output tube connects. You need to keep the flyback connected, since it supplies current to the yoke, etc. The tripler takes care of the actual HV generation.
You may find the tripler actually works a little better than a real flyback supply. HV stability may be a bit better, for better focus stability, etc.