Korg B1 Nutube - Improved Grounding Scheme?

Is there a way to improve the grounding of the kit? I just built the kit and followed the 6L6 build guide. If there is a way to improve the grounding, what should I do? I'm thinking make a bare spot on the chassis and run a ground wire(s) to it but where should the ground wires come from -- pot, input, output, etc.?