Send your gear to the manufacturer. Otherwise a LDS that has a dedicated full time tec. that specializes with your brand of gear. Stay away from the jack of all trades. Anyways regs are not a DIY project unless if you work on over 150 sets of equipment a year. Even on the net your not going to find all of the info., updates and service bullitins. Anyways the labor cost is only a small part of the service. You’ll need to find the parts anyways and still won’t be able to tune it correctly to its best performance. Better yet do the house chores. So you can get away on that weekend of diving instead of cleaning the garage.