I'd call it half-bad. However, it's low impact. A good idea is probably to cut an access hole in the floor under the base, and glass threaded plates up on either side. This would allow you to thread into them to hold them in place, the glass would just have to hold them up so you can start the bolts. It would be much more secure, but a lot more hassel. Start with a half-bad low impact idea. If that doesn't work for you like it did for me, head toward full-bad next step ideas.
I spent most of my money on booze, broads and boats. The rest I wasted. - Elmore Leonard