Hey fellas hope to find some info on a p bass I got on trade, it's passive and I just put some vintage model p's and it sounds great. My question is can I install a model j jazz bridge pickup? That being I get it professionally routed. I would like to get that p and j blend. How would I go about it, is there a volume blend pot or tone blend pot that aren't active that I can use? Any suggestions or part numbers would be great thanks.