Hi TalkBass! I've been lurking here on and off for a while, and to me this is one of THE online authorities for bass, and so I trust you guys with this. I am developing a bass design, and I need you guys to chime in. I am primarily a guitar player, but I play bass in a band as well, and to my weakling baby guitarist hands, it's a bit fatiguing in the long run. This is the inspiration for the bass I am working on, which will be more guitarist friendly, rather than attempting to cater to the traditionalist bass player. Examples of what I mean are basses like the Ibanez SR series, which has a great thin neck profile, and the Dingwall models that play similar to shredder guitars. What I need to know is which string spacings you guys are familiar with for 5 string guitars. I want a narrower string spacing but I don't know where people think the limits are. I also need to know about fretboard radius. What is a comfortable radius, and why? I like flatter radii, which for guitar is 18 degrees or more. I am going for 20 for my guitars. Do you prefer a rounder or flatter radius? Does it even matter to you? Finally, neck profiles! What kind of neck do you prefer? I tend to gravitate towards a shallow/thin C shape for guitar, rather than a flat shreddy D shape for guitar, and I love asymmetric necks. What works best for you on bass? All feedback and details are GREATLY appreciated!