Updated with the Norvil pre MKIII vernier kit ( just the rubber and two end caps...$124 Cdn...pretty good price). Quite easy to remove bracket...was expecting it to be loaded from engine weight but all bolts came out smoothly and did not need to pull right or left side header off to free the main central bolt....was expecting to need that based on a couple of videos on YouTube showing the need for removing header(s). Original rubbers came out easily just by sideways rotating with a screwdriver. Seemed they were in pretty decent condition for 44+ yrs or service...not heavily out of round. Bracket interior only light dusting of rust easily cleaned up. New rubber in using dielectric grease (rubber compatibke). Not hard to do really...but holding bracket in vice helped a lot. Putting on new gator boots finicky...they are a different shape than oems (which were in reasonable condition...no holes and I could have returned to service). Getting bracket back into frame was quite difficult, despite the kit stating no mods needed for the main tube on pre MKIII. Made it fit using 2x4 wedged between downtubes to help separate them a bit, persuaded there with big rubber dead blow hammer....also used to drive bracket home after much fussing orientation etc. Next major hassle was trying to retract new boot and locate the small adjuster holes with a suitable sized Allen key. Had to do that mainly by feel as could not visualize at such close distance etc. Bike in side stand, got it dialed in to 0.006" when engine pryed over with a tire iron lever. Anyway, all buttoned up now...time for a test ride. Mailman brought me my new stainless seat knobs (Commando Specialties). Nice reward for the hard labour.