@Sitting Duck I've already got a decent, variable temperature soldering iron (as I got very annoyed with my cheapy stick one). However other hobbies have gotten in the way of me practising the art of soldering neatly. I've yet to open up the gear box on an aeg, and don't really fancy doing it on a gun I like to use. I'm keeping an eye out for a cheap used one so I can open it up and have a poke around. ?
For now, I'm happy to pay someone who knows what they are doing. I'll speak to Sam and see what mosfet he would recommend. After speaking to many people who have had work done by him, I trust his soldering and wiring skills a lot more than my own. I don't think I really need something fancy, but if the price different is not that much, well, fancy things are cool