As I say, if you need some some help - please just ask. I know a few people who've had a go at this sort of thing before and failed due to making silly errors.

I encourage reading http://lasertagparts.com/mtcore.htm as this may help you out with a lot of answers to questions as well.

For the FETs, the IRFD110 seems to have become a bit of a standard as well - readily available in the UK from Farnell.