I want to get a Drop D Xtender for my bass. I've been shopping on the web and Hipshot seems to have about 30 different styles! None of which are described as the one I should use. I have Grover Tuners on my SX PJ. All the Xtenders I've seen are described as suitable for Fender Vintage, Gotoh, Schaller, etc. I haven't seen one that explicity says USE FOR GROVER TUNERS. Can someone tell me which one I'm supposed to get that will fit my bass and match my Grovers? At $80 a pop, I don't want to get the wrong one and play the 'return and exchange' game. TIA!