I've been trying to figure this out for a while, but just can't get it down. I use router rails to thickness small pieces of wood, but I'm trying to get four pieces of a sandwich body really flat, and I'm having some trouble. I have to thickness an acoustic top too. Ideally, I need a drum sander. But my workshop all fits in a cabinet, and has to go down a flight of stairs any time I want to work.
My latest idea involves clamping router rails to wood at both ends, securing it all to the work surface, and moving the board from underneath while the router stays stationary, kind of like you would with an overarm pin router. My fear (obviously) is that it wouldn't be very safe. Then again, if I clamp it down really well with a lot of clamps, it might be ok. Really there would be less than 1/4" of bit exposed below the rails most of the time, so even if it tried to suck up my hands, I'm not sure they could get through the small open space to the bit.
Here's my plan. What do you think?
Thanks,
Dave
P.S. The illustration doesn't reveal this, but I'd clamp the whole thing to the table too.