You can get about 3 inches rise/fall without vigneting. After that you might get about 3 more inches but you loose about 3/4 inch on both sides, I just crop this when I print if I have used that much movement. You have more than enough coverage for tilt and rise/fall. The 355 I have not used but I have heard it has enough coverage with plenty of rise.
Yeah, with exception of one lens he had about a month ago, I have not seen enything that guy sells that is any good. Most of the junk he sells is process lenses which IMO are more hassle than what they are worth, unless you have them mounted.
So to get back on topic does your friend Charles limits his editions?