1) I found that using the regular BB loader (without adapter) is probably the fastest way. With some training it can be done. Personally I would grab the mag using my left hand and position my left index finger horizontally just in front of the lip to prevent the nozzel of the loader from slipping in front. Then load the BBs in with the loader vertically.
2) Should be OK. (someone correct me if I'm wrong)
3) Han't tried it before. Should be OK.
4) I have been trying to get a set of tools myself. But it's not easy. I've seen QxF having a complete set for sale - real gunsmith tools. You can get one or two sizes from Ap Liu Street but never the complete range that you need. My cheaper solution was to get a set of $10 screw drivers set and cut the ends with a metallic cutter, pollish the rough ends a bit and ended up with a nice functional range of puches.
Hope that helps
