How to solve side pipe rattle....

[RedEye]

I purchased a set of side pipes from Shell Valley two years ago when building my kit. I had the pipes aluminum powder over ceramic coated inside and out, so the heat dispersion is tremendous and I am able to even put my hand on one right after a hot run. Unfortunately I think some portion of the inner baffling has come loose on my driver side side pipe, and it's rattling around when the car is at idle. At first it was no problem, but it's starting to make me nuts, and for passers by it makes the car sound more like a rattle trap than a well refined machine. I would like to resolve this but can't think of any way of fixing it other than cutting long thin hole in the bottom of the pipe where few would ever see it, re-welding the guts (praying that this won't mess up the exterior coatings) and then patch and paint the bottom back together.

My other idea is to try to locate the loose baffle by tapping a rubber hammer along the side pipe and then drilling a small hole into the bottom side of the pipe. If using an arch welder with an insulated rod I could potentially slide a rode down the hole, tack the rod to a piece of loose baffle and grind and well off the surface end of the rod, only needing to paint a small spot on the outside of the pipe.

Other ideas may include some use of a camera and high temp silicone down the end of the pipe, might try that first.

Would like to hear suggestions or what other people have done who have had similar problems. Thanks!