Okay, I'll give that a go.
I used a two-temp soldering gun to build it and it may have been cooler than what I'm using now. I'm also not sure of the solder I used (it was from a friend), but my guess is that it was 60/40 because it flowed pretty well. When I replaced the power switch recently (after the hum started) I did try silver solder, which I had never used it before, but then stopped because of how poor it flowed. It was only used on the switch connections, and they seem okay. Currently I have rosin core 60/40 and that's what I've been using in my recent touch-ups with the 60 watt iron. Do you think that's okay or should I get some 63/37? Should I attempt to remove much of the existing solder using a sucker? If so, any recommendations on one? I don't have one currently.
And just to clarify, when you say "the bad side", you mean the side with less visible solder, or the side's that's aren't smooth and shiny?
Are there any videos, pictures, or tutorials out there that you guys would recommend that would be especially helpful for this project? I've watched a couple "how to solder" videos, but maybe I would do a better job if someone provided some pictures of properly soldered connections on their Crack?
Thanks for all the help.