I know I was hijacking a brass plug thread but I'm so darn frustrated right now I had to start a new thread!

I don't know if they used super glue or what the hell they did but I can not get the carb screws off for the life of me. Even one I got off with an impact driver wont come back off!
I tried impact driver, regular screw driver and hammer, vice grips. Nothing is moving this screw! I have no idea how they could get it so tight without stipiipng the screw. Looks like they just poured molten brass into the hole and let it set.
I worked on ONE screw for over an hour with no progress. Now, I have 2 stripped screws, one that will come out easy, and one head so mutilated, you can't tell it was a screw head.
Short of drilling the suckers out, what the hell can I do!?
ps. Tried pulling the carb off but realized the battery box was in teh way. They put this bike together like a freakin' jigsaw puzzle. Everything has to go together in the right order or it wont work!