I have a Waidea vapor flask with the Rayn V3 still in it. I have a dna 40 board on the way for it. I actually have 2 Waidea's, one black and the other silver. The black one I put a FDV V3 510 in and stopped there. But the silver one I'm going to go all out, FDV and a DNA40. Now I know I'm going to have to use the extra ground that's on the board to ensure a proper working mod. My question is, any thoughts on where I can put this ground? Space is minimal at best. Silver epoxy maybe somewhere? Any help would be appreciated. I'll post pics of my progress down the road.