I think it's about as easy as it's going to get, because, as you know, making styles is very complicated. I used to make a lot of them when they weren't so readily available, but I was doing drums, bass and a simple piano and/or guitar strum of some kind. It still took a lot of time to get it right. As I recall, the Technics arrangers had an excellent style creation feature. And I can remember converting some Roland styles to Technics, on board. Don't remember the details though.