just did mine this weekend and the only thing ive ever soldered is copper and it still was pretty simple. I ran into two problems
1.one of the new leds was bad but didnt realize it at first-sucked
2.my fuel gauge wasnt working right and ended up putting a jumper wire from one of the stepper terminals to the curcuit board(much easier than it sounds)
Also did the 4X4, headlight and cargo switches. shitty part was my buddys and i were drinking few to many beers so took longer than expected.
Diesel Place has some good write-ups as well as pictures if u cant find them here