I basically have the same set up on my TXT-1 as far as electronic set sup although I run it at 14.4 volts with 3300 packs, plenty of speed and rum time. I can think of a couple of cheap mods. (1) Lock the axles-JB weld or Hot glue. Not sure how the hot glue would hold up on the TXT-1 but so far has held up on my TLT-1. (2) Replace the drive shafts with T-MAXX Sliders, these are much more durable and won't slop like the stock shafts. Might have to dremel out some material from the trans case to clear them as they are bigger in diameter. (3) Foam inserts in the tires then glue them onto the rims, unless for rock crawling-no foam, tires will grab better. (4) High torque servo, a bit pricey but this rig needs it, along with a good saver (Kimbrough or Ofna makes decent ones). (5) Not sure about your chassis mod unless you have a way of remounting the trans, then that would increase driveline angles. Thats all I can come up with for now. Have fun with the truck. How's the weather in AK. ?