i just got my a bigsby b7 installed on my les paul. yes, i have tuning issues. i've been caught up with the decision of changing the saddles on the TOM bridge, or changing the nut. or both? and when i do, i'll send it to my favourite tech to get it properly set up. i need suggestions for the TOM bridge and the nut. i've been reading up previous threads. why do bigsby users discourage roller bridges? i was thinking of graphtech saddles and nut. any recommendations?