I have a line on a 7-10 but the price is too steep for me. ($150 at a pawn shop) There's also a "make offer" 6-10 I'd like to snag. Do have a couple PM700's and like em a lot. Just a little short on funds right now for the other ones since I'm tuckin' away for that PM8200 piston..., and the source is really proud of it, too.
On the gasket guy, was just wondering. Free shipping and I'd probably see stuff from him in two days where I am. Last tank gasket I needed I made out of 1/8" Fel-Pro gasket material. Cork and rubber combination. Worked great, but making the template and cutting it to fit was a real pain. Have since been turned on to an easier way..., by just cutting a strip along the gasket material edge to the required length of the whole gasket and fit it into place with a butt joint sealed with IndianHead or something along those lines.
Can also use the 1/16" Fel-Pro (or any decent gasket material for that matter) in two layers with the butt joints in different locations for an even better seal. Can make about a gazillion tank gaskets out of one sheet of Fel-Pro that way. (give or take a couple hundred)