the Diezels are kind of odd/different. they have a lot of bass pre distortion, and if the guitar PU combo is too fat, it get's crazy fuzzy. just horrible. Had this with the Boss.
Anyway, the flat50 bridge is great! beautiful string separation and great clear fast and cutting attack. makes for a defined clipping, not the bloated mess i get with some other PUs. and all this without thin sounding!
I have it in a bright Ash/maple tele. So for now it's hard too tell for me how much is the PU and how much is the guitar, but i had the boss in this one too, and even in this the Boss was too full for my setup. i have a accoustically very full sounding Ash/maple tele, too. sounds good unplugged, but i haven't found a good PU for it yet.
The flat 50 sounds great where it is, but i will move it at one point, because i hope it will save this guitar.