I'm having the PUPs replaced in my 84 Yamaha SA2100 (semi-hollow, similar to a 335) with a Custom 5 (B) and 59 (N) both have gold covers w/4 condictior to incorporate the coil splitters (push/push). It was suggested that I change the volume pots since everthing has to pulled out anyway. I don't know what "K" value the existing are. Based on what I have read 500K for HBs is typical, if the existing are 500K should I change them for newer ones? any suggestions/opinions are appreciated, thanks.