I recently repacked my muffler (stock ktm) with Lexx premium packing. When I pulled the old packing out there didn't appear to be any sort of liner or steel wool of any sort. As I'm looking at other how to videos, one in particular mentions it is very important to line the inner core with two layers of steel wool before wrapping the packing. I did not do this. Is this to be of any concern? Also, will the muffler smoke (very slightly) with new packing for the first time?