Welcome - from another Mark III rider.
I was riding back from the monthly Brit Bike night get together in San Diego yesterday evening, riding up Interstate 5, thinking what a great riding bike this is.
Traffic was relatively light (unusual) and moving along at 75-80 mph. I got a case of the "feelin' goods" and blipped the throttle a few times over the course of 15 miles or so - easily taking the bike up to 95 mph - all the while with a big silly grin on my face.
I've had other vintage brit bikes before and had tons of headaches (as did most of us), but the Mark III runs sweet, true and strong, after all these years.
(And yes, mine suffered from a cam meltdown too, with the previous owner) All sorted out now, with Boyer, Sparx 3-phase alternator, Mikuni 34 MM, Corbin seat, Motormite check valve (which for $5 is a miracle - stopped the engine oil leaks!!), upgraded brakes, etc.
Have fun, ride safe.
Feel free to post photos on my site, www.myridz.com
, under the Cool Bikes tab.