I bought this grendel bass last year out of compromise. I needed a lighter bass, the bass I was lookin at got swiped from reverb too fast, and I thought i’d take a chance. This has turned into my baby. My number 1. Work horse... But I’m realizing that I don’t know anything about the series or this particular bass. When I got it, it had barts and a bart pre, I put in the aguilars, went passive, series parallel switch, sticker inlays. I know they’re made Czech Rep. I know there was another bass similar to it called the Beast. Any more information would be awesome. A big thing i’ve heard is that it has the Buzz Feiten system. Is this true? Anyone ever put a detuner on one?