Hi, all- Wanted to share my experience so far putting a Bob Newby belt drive on my G15-CS. I chose the Newby unit because I was tired of the mess and repeated re-gasketing of the wet primary, having had it put together and needing to take it back apart a few too many times already. I also have a Newby clutch on my Enfield, and am very happy with it. I also took the opportunity to modify the inner plate a little to gain easier access to the magneto cap and the primary tensioner bolt, and to ease routing of/access to the stator wires. I spoke with Bob and he was encouraging, but warned that some work was necessary to fit the setup into the G15’s primary case; notably, the outer cover needs to be spaced away from the inner. He directed me to a Jampot article about installation in an AJS for reference, which noted: "Four modifications need to be made to the alternator chaincase of which only one is visible. 1. The embossed circular ridge surrounding the gearbox mainshaft seal/tin slider on the inside of the inner chaincase needs to be ground flat, either with an angle grinder or a rotary file. In this manner the new clutch can sit comfortably on the gearbox mainshaft without fouling the chaincase at the rear. 2. The lower section of the inner edge of the chaincase filler plug boss needs to ground down on the inside of the chaincase. Only a small portion of the bottom of the boss needs to be removed to allow the belt to clear the outer chaincase and the removal of metal should not affect the fitting and sealing of the chaincase plug. 3. The standard inner/outer chaincase locating dowels (2) should be removed and replaced with new dowels made/inch longer. 4. A spacer should be inserted between the two chaincase halves. I used black/inch thick hard Vitryl rubber on the prototype and torqued each chaincase screw to 5 lbs. If the screw clearance holes in the spacer gasket are punched out on the tight side, they'll stop the screws coming loose. Latterly, I intend to fashion an alloy spacer, probably in two parts and, I've noticed now that I can probably reduce the thickness to 1/8 inch (N.B.reduce the dowel lengths accordingly). The spacer is the only visible sign of the conversion as far as the chaincase is concerned."