First let me say hello, this looks like a very interesting place. I am an older first year engineering student and amateur bass player. Last summer I received a used ESP B-208FM 8 string for my birthday. I freakin love the tone and changed it over to BEAD which makes me like it even better. But one thing I didn’t like is the string height difference between the octaved strings, there is a huge difference between the B strings for example. For me it is a playability issue, I wonder if other players haven’t felt the same way. Well I bought some monster .102 fret wire and hand made stepped frets so that the top of the strings are level, cut a new nut and filed the bridge adjusters accordingly. Only did the first 12 frets so far as this turned out to be an ordeal but it is fantastic to play now. I kinda have an idea on how to make these, what it might cost to produce & install. Because of the large amount of labor it won’t be cheap, somewhere in the 6-12 hour range to make and install a set. I can’t see a cheap way they could be manufactured, definitely not a diy job installing them. Any opinions on this? If a refret job like this ran $300-400 would that be in the range of possible interest? Trying to figure out if I should pursue this further or if I should just be happy with my own bass. Sorry I can’t show a picture, since I haven’t patented anything yet. Or maybe I reinvented the wheel, somebody already makes these.