Long story short, I need to attach baseboard molding to a sheetrock wall.
The problem: instead of having a 2x4 behind the drywall to nail it into,
there's concrete. So we're talking 1/2 inch drywall butted up against
solid concrete. I'd rather not use glue/silicone because removing the
baseboards some day would in theory destroy the wall too. Any ideas?

Thanks,
crabshell