i tried it and i have to say it didnt work for me. i didnt like it at all ^^, went straight back to my old setup.
also i dunno which pros u measured and how bc u dunno the sw from every pro. but for example gonzo was a long time top 10 player and his MgR/I is nowhere near 21. aswell as nadal is rank 1 and his MgR/I is not even 20,1 its a bit lower. ferrer MgR/I 20,4... and i could measure a lot more pros like this. i just dont want to count more lol
(i measured their MgR/I's with the "perfect" sw of 360 and juras specs)