Best site to repair a gun

Hey everyone. I've had a broken Galaxy MP5 for a while, with the gearbox apart. I took the gearbox apart knowing what i was doing, but there are no good sites on the internet on how to put the gearbox back together, because of the weird shape. The only trouble was the piston was crap, so i want to get a better one, but i cannot because i still can't put it together again. Which is the best airsoft site i can trust that will replace my piston and put my gun back together in one piece? thanks.

I have no Idea what sites or smiths are available in your area, but I would suggest that you do it yourself, no better way to learn the mechanics of a GB than by doing it yourself, and later you find that your down time will decrease with increase in knowledge and experience.

well if you can't figure out how to do it try Google.....

I did try google. It came up with a bunch of sites all claiming they were the best. That is why i am asking here.

Airsoft GI has a good smithing staff. Thats where I get all my work done.