Has anyone fitted The TbT kit to a 97k and what was the result, worth doing?

My 97k is a 2008 model and is twanging like hell with a now quite vicious recoil. Got it all stripped down for a clean and regrease and I'm thinking of fitting the maxi pro kit but its 70 odd quid delivered.

Does it make the gun 70 odd quid better or would a good clean and regrease be enough?

DC