About to do my first EM playfield swap. I have done around 20 so far in the solid state realm. Wanted to hear your approaches/strategies so I don't make a rookie mistake and cost myself a bunch of time, and a headache! Look for things like leave the solenoid harness attach to the mechs, etc? I plan to run the new supply wire for the GI and feature lamps. I have heard of difficulties of resoldering the wire back to the mechs if the harness is removed.