My pool is about 25 years old, replastered about 15 years ago and in good shape. I just had the concrete decking overlaid with 1" thin pavers. Now the wife wants a railing installed to ease access along the steps into the pool. Shouldn't be a problem anchoring it through the pavers into the concrete with On-Deck Mounted Anchor. But is it possible to anchor it in the pool bottom without draining the pool? I picture a long (4') bit extension and a masonry bit drilling 4 holes in the bottom to anchor the rail (using pool vac line to suck up the drilling). But is the plaster/gunite/whatever strong enough then to support the rail?