think youd be better off cutting open a stock pipe...
couple folks have gutted the stockers, and even shortened them.
you can cut the end off, and start hammering away at the internals or use a hole cutter with a long extension to hack big holes through them
no point in ruining a set of TORS, you could always sell them and have money for a set of jardines later.
I ran a big bore drill bit through my stockers when I had them, just drove it as far as I could, made four neat holes around the stock end plate. went through about 2-3 "baffles" on the way down, still ended up switching later