I thought Schumachers were bolt in and go?

I don't understand why anyone would replace tti's. They fit and most others don't.
Well I'm a little upset to say the least. I spent $400.00 on used Schumachers then got them Jet hot coated for more money and they don't even come close to fitting. Looks like I'll have to get my TTI's coated again and put back on. I took them off to put the Schumachers on because I though they would fit better and not interfere with the z bar like the TTI's even with the modified Z bar. Also my TTI's are about 10 years old and could use a new ceramic coating put on. What would you guys do about the Schumachers call the company and show them and maybe talk to Accurate exhaust about their modification. I will say if you look at rklein's modification to fit it does look a lot like the area that was added and welded to my Schumachers? I just am at a loss and aggravated.

Carl