My '90 just had the normal guide stud setup. However it was super hard to get it loose, as in used a long allen wrench and a homemade extension but the bolt head was starting to strip. Tried for awhile and decided to look at the side cover method....after messing with this said "no thanks" as it's a PITA to get to and is really hard to see inside the little tiny hole. The Banks manual also suggest that you can adjust the rate screw with the governor assembly still in place if you have a ball-end allen wrench. I tried this method and the trouble was it's almost impossible to see into the inspection hole to align the bolt as you can't get enough light into it. Went back to the guide stud and finally got it loose. After that it took about 2 minutes to adjust it and reinstall. I know several people express concerns with messing with the governor, but it appears to be a really simple linkage???
Started the process of removing/fixing the broken off top cover bolt. Tried the method of walking it out by tapping on the nub with a punch and chisel but no go (not work to work with because of the size). Then started with a bolt extractor set that comes with left-hand drill bits. Drilled all the way through the broken bolt with a smaller size bit (bolts will often come out with just the left-hand bit), then tried that extractor......no go, and didn't want to crank on the extractor too much and risk breaking it off. Went up to the next size bit and extractor and still no go. At this point the next size bigger bit would start getting into the threads, so will just run the appropriate size tap through it which should clean out the remnants of the broken bolt. Would of done this last night but didn't have the right size tap.
