Just want to share some experience in hopes that it will be helpful or inspiring to someone. I'm learning songs for a new band that are (right now) out of my league. I was told I could simplify the bass parts, but I don't want to. There are riffs in the music that are impossible for me to play. I'm motivated and determined and learning a lot. I have been working on parts and finding out how valuable patience is. I was just working on a one measure riff, playing it over and over, slowly, for about 50 minutes. An hour ago I couldn't play it at all. Now I can play it as if I wrote it. There seems to be an amazing thing the body does in remembering things. Once I get past the notes, and play something long enough, my fingers remember it, and they kinda go on automatic pilot. After a certain point, something sort of clicks, and really fast impossible things all of a sudden feel like something I've been playing for years. I had the same experience learning to slap. Just felt like blabbering cuz I'm happy about this.