I am a bit confused as to the different adjustable bridges for Gretschs. I would like to upgrade my adjustable bridge on the 3161 to a tone pros bridge but not quite sure as to the best option/model available. This one:http://www.allparts.com/TonePros-AVR2-C-Bridge-p/gb-0523-010.htm AVR2-C or http://www.allparts.com/Ton... TP6C Also looking for the best direct drop in fit and quality tuners for it as well and wonder if this is the right choice: http://www.stewmac.com/shop... for direct drop in fit. Any advice would be greatly appreciated.