3D printed myself a chain guide out of nylon. I wasn't having much luck with the off the shelf chain guides they where interfering with the drive sprocket so i designed my own.
its a 2 part deal and mounts on my lower swing arm. Instead of the conventional approach of a fixed point slider or roller i made this to act as a damper for the chain the two arms damp out chain oscillation and straiten the chain line coming off the sprocket. I'm still working on the upper chain guide and the two will clamshell around the lower swingarm