I am new to the forum so if this has been covered b/4, forgive me. I play with an old set of Tommy Armour ti-100 and am about ready to upgrade. I am looking at a Clone of the new Callaway x-18 (I think, may be x-19). My question is; Is there that much difference, in general, between a clone and the real thing? Also, how important are custom clubs. I.E. Lie angle, type and length of shaft etc?