np, if I were you, I'd keep using this tub for veg. Thats my veg tub, is a 10 gallon rubbermade with 8 spots. I use 4" netpots, but you could use the 3" and probably get 15 in there (and the net pots will give you more support) Gives mine enough support to get up to about 3'

As for the sex shop stuff, yeah, the latex is made for dipping the handles of tools to insulate them. It's like $15 a quart, and it'd be much cheaper to switch to netpots or neoprene collars :P

but yeah, you've got the basics. Make sure your using clonex hydro solution though, the gel won't work.