When I went to Taking out my 42 tooth gear out of my hsp warhead, I noticed that a allen key screw was very stripped and I could not get it out to replace the gear.
Here is a picture of the stripped screw (please Help)
Get yourself a dremel with a cutoff disc bit, and cut into the cup until you cut about a 1/32' of an inch line into the grub screw. Take a jewelers standard driver and back it out.