Need advice--please don't hate me!

[veg-o-matic]

I know I'm going to make some enemies here, but I'm at wits end over this set!
Got an Olympic CB137 that I've had two different places and neither one can get the dang thing going. It's a gorgeous blonde set I got from Captainmoody last year and I don't want to trash it. Nor do I want it to just take up space.
So what I want to do (here it comes...) is take out the picture tube and slide a new color set in the cabinet. I know, I know, but at least I'm not turning it into a liquor cabinet!
I've got the Sams for it but it doesn't mention how to remove the tube. Anyone got any advice? There's a bracket-y thing on the top of the tube bolted to the cabinet and it looks like there's another bracket bolted to the bottom. Please bear in mind that I'm rather fumble-fingered and would like to do this without killing myself or losing an eye!
I'll make sure to take a picture of the original and post it before I begin my unfortunate hatchet-job.
Thanks, and I'm really not a bad person!
Bob