Definitely understand your situation.
I'm not trying to sway you on TSS, but if I were you I would try a different choke tube with a couple different non-TSS loads first. If you're looking for another 10 yards, I think you could get that with the right tube. Indian Creek, Patternmaster, Carlson's, Kicks, Primos, all make tubes that you could pick up for a few dollars more than a box of TSS. Plus, if you don't get the full 10 yards you're hoping to gain, you can always shoot your TSS out of that same tube and potentially have a killer set up.