Hey guys anybody using the colt pen bits, I'm having major problems with the 7mm its drilling crooked, you can watch it flex when starting and by the time it comes out the end its at least 1?8 inch off. tried staring slower , adjusted Dp , have a self centering vise clamped down. I think its too long , you just barely touch it and it flexes badly. Not much problem on the 8mm and bigger. Al