One may be able to do the mechanical work, and pick a standard stack, but shaping damping force curves for one's favorite track is beyond the vast majority of those that could do the mechanical work. In fact, I'd say 95 + % of the people contemplating having work done, don't even understand damping force curves, but at least they know they need a better one while not knowing what it should be.
Street maybe, but for heavy track use, why not go to a whiz that knows what is needed and let them loose on one's forks? I got a real eye opening when I took my Race Tech computer selected build sheets into the chassis guy. One stack was changed a bit, the other noticeably. And when I picked up the forks he told me about the special drilling he did for a change to the Low Speed Compression, which is nowhere in the Race Tech instructions, in fact it's not even mentioned. One of the best bargain's I got for my 919 is the chassis expertise from Mr. Willie Vass in Carstairs Albert
95% who don't understand damping, don't do any fork work. The reason I told rmb to DIY, I offered him some help in the past with the shim stack.
As far as the track tunning and the track use, very true. One needs to work very closely with the suspension expert in order to fine tune and get the most out of it.
Any suspension expert will start the stack and comp/rebound setting from point A - rider weight/experience, some basic sag #s and track conditions.
After a few laps, that's when magic happens, it's very important having a suspension expert who will take your track riding experience/feeling and integrate into your suspension.
PS. RT gold valve stack is a very stupid stack, if you will. RT has a philosophy to open the valve as much as possible and then control damping with just a stack.
My favorite affordable valve kit to date is UES kit by Ohlins. Ohlins put much more thought into the valve design and honestly HMAS showa valves aren't that bad for the street. RT gold valves never again