I'm really curious what would happen to the computer. I've never done this on a MC, but i've welded on many cars and have never fried a CPU. Because its steel, you have to weld it wiith DC current, there are no high frequency issues like there are when welding aluminum in AC current. The key is grounding properly and directly next to the area being welded, providing the current the path of least resistance. I'm not saying "go ahead and weld it...let me know how it works out!..." It probably would be a good idea to remove the computers, just to be on the safe side.
BTW...hows it going Mollydog! I haven't seen that part of LWA as of yet, what happened when they welded the frame? Was it Aluminum or steel?