So do these 2521 tanks fit on the Unicolor motor base? Sounds about what I'm looking for.

Thanks Aggie, I'll keep an eye out...but if I'm asking for it for Xmas, Blake can pay for it lol!!

And Lee, Thanks for the info on that Expert drum..that filling regime is not for me lol

And brimc76, That sounds like an idea...I guess you used a pretty small bead of silicon, then the seal? I'd think, if you used too much silicon, then you couldn't get the lid and tank to fit together no?

Thanks for all the help!
Chris