Leaking Bassani X-Pipe

I have the new style Bassani X pipe for my 97 Cobra that comes in 5 pieces with the small round cats. It all fit well but I have a leak infront of the RHS cat. It is leaking even though the band clamp is TIGHT. I am wondering does anyone know if it would help if i loosened up the band clamp and moved the cat up 1/4" at a time if that might help stop the leak? I would weld it but Bassani was clear about that voiding the lifetime warranty. I just want to stop the leak!

Any help is appreciated.

Yeah I HAVE to fix it ... the noise is driving me crazy and I have only put 100 miles on it. I will pick up some permatex and try that if repositioning the cat on the pipe does not stop the leak.