So I'm thinking of upgrading the stock preamp in my Ibanez SR505 to a Bartolini NTMB but noticed there's two options, one for a active/passive push-pull on the volume knob or without. Now I like the idea of push-pull but does it matter what type pickups I have with it? Such as if the pickups are active will it even work? I currently have the stock MK1 pickups but I did a search and there's a debate on whether these are even active or just passive with and active pre. Apparently some people have contacted Bartolini and they're not even sure since the MK1 is made overseas? Also if I wanted to upgrade the pups somewhere down the line to MK5's would those be compatible? Anyway sorry for the noob question, I'm trying to learn more about my instrument and search has failed me yet again. Any help would be greatly appreciated!