You can also try heating the post up with a small torch. The expansion the metal might cause the screw to come out a little easier.@Rob Fisher, I JUST got my Griffin and stripped one of the grub screws immediately, since they come locked in and the allen key is apparently horrible. Couldn't even build on it!
Any advice on getting the stupid screw out? I've already tried all the tricks on the interwebs. If all else fails I'll take it back and let @JakesSA have a crack at it.
What I've also done on my RC cars with small stripped allen bolts is to cut a slot in the top of the bolt with a dremel and used a flat screw driver to take it out. Dont know if this is an option for you.