Been a while since I updated my results. I was unable to ride for almost two months after almost severing my right index finger. I'm back in the saddle again, and have ridden the bike enough to be comfortable that the current setup suits my weight and riding style. The 00360-06 springs are just right for me at a weight of 195 lbs. without riding gear. I ended up with preload at 11 mm (8 turns on the adjuster). My grandson also likes the way they feel, but says it is still a little stiff for him. It's his bike, and he weighs 35 lbs. less than I do, so we will probably try the 00360-05 spring for him, once we get the front end sorted out enough that he can do some test riding. I doubt if we will try the 00360-07 spring, unless the bike is regularly used for two-up riding, which seems unlikely at the moment. These are definitely the best shocks I have used on a Commando.
Ken