Since no one has jumped in here I will add my own 2 cents, and that is about all it is worth.
1) Slow combat or Speed limit? they are not the same.
2) Bladder material..... Just be careful the stuff from the hardware store is often too thick and will give you too high of pressure. I would get a foot or so from Phil, Tom Siegler, Melvin Schulte or GRS. If you use the thick wall stuff, you may have trouble needling the engine.
3) 22 castings, aircraft rivets, short chunks of nylon or al rod (smooth), irrigation good plugs all work fine. you can tie a knot in it too.
4) I like close pin style clips, long wires so you can stand up and big batteries. I use an old globee. Others use 1 12 power pannel, some have had failures. my borther loves the little radio south ones. For combat, clips and wires still seem the way to go.
5) The OS 10 remote needle seem popular. OS#1A about $9.
6) Get some method to pinch the fuel line.
go to
http://www.clcombat.infoor
http://necn.homestead.com/