Played a jem with these fitted, Have to say I was surprised at how good they were. Didnt feel weird & could do anythin a normal neck could with no problems. Only took a few minits to totally ignore them
But as for bending your own ? hmmmm. I could route the board to take them no problem, But the frets are a totally different thing. You would need to make a die & maby heat the frets to make them plyable enough to bend about like spagetti. You would spend more time & money than would be viable, Id just buy a neck ready to go (untill i figured it all out)