Hey bud - I'll echo a few of the things already said:
1) I used JB weld in addition to screwing the toe spikes into the boots. I've had some issues with the spikes turning up. Some crazy glue has kept them stable. Doesn't need much.
2) Unfortunately I don't know how to fix your gauntlets. For such a small piece, you may have to rig/patch something together yourself as that area is already molded into the full gauntlet. As for the hoses, I'm curious which hoses you have that don't bend so easily. If they are basic plumbing hoses, they should be the same as mine. I have mine attached (key ring + carabiner) to an elastic under my sleeve so that there would not be any pulling.
3) Jetpack looks much better. I agree with what is said about the harness.
4) I would perhaps have a wider thong or loosen it slightly...mine is 1" wide, same as the knees, and is tight enough so that it doesn't dangle, but loose enough so I'm not too cheeky 
Glad to hear about the things that worked. It really does take some time to get comfortable with putting everything on, finding out how long you can troop (what works/doesn't), etc. I've been on about 10 troops and finally have just gotten used to things. You get comfortable and deal with things like walking distances (especially for parades). Heat and general jetpack discomfort will be normal.
I highly recommend that you suit up where you are going to troop. Or if it's not convenient, make sure that you walk unmasked and your blaster is concealed safely. Depending on where you are going, there are VERY strict laws about being in public with weapons or being masked. Just the other day I heard a story about a guy in a trooper costume standing outside a school with a toy blaster. Not the smartest idea....he got arrested. Police are generally pretty good about it - especially for cons, but don't give them a reason to pull you over in the first place. They have every right to confiscate expensive props if they look like they may be a threat. I don't mean to be a negative nancy, just my experience and what I've seen happen.
Good luck with your updates!
