the fitting system works wonders for people who dont want to stick with run of the mill TTDG shafts. The best part of the whole thing is that it will kick back 3-5 different shafts, and almost always one frequency of the project x shafts. The numbers it kicks back are:
Swing Tempo- lower the number the slower your transition from top of backswing to beginning of downswing
Toe Down- The amount of flex your putting on the shaft from downswing to "turning it over".
Kick Factor - the "turning over" process of the shaft
Release Factor - extension
based on this, the program kicks back certain shafts. gone are the days of 90+ mph = stiff, 110= x-stiff, or whatever the hell you brought up to believe.
example: Joe swings 105 mph and is currently playing s300's. he has a quick swing tempo but "casts" the club out losing a lot of torque in the shaft. based on that, the program will recommend a lighter weight shaft in the 105-115 range, in a regular flex, that is tipped.
Joes friend Tim only swings 85-90 and currently plays a regular flex. Tims tempo is much slower, but because he keeps his hands ahead of the club longer hes putting too much stress on the shaft. the program will say to bump up to stiff flex or even an x flex.
hell, the second we got it work, i fitted myself. i dont swing fast or hard (ive gotten a couple "your swing looks like ernie els" statements) only 85-90 with irons, 105 with driver, but it kicked back KBS Tour 90 in X. tried it in the mp58 head, and it was beautiful.