what kind of freezer are you using? My keezer is an MC 7.2, I have 2 towers both two faucet mounted on the lid, the only thing i did was add a small 10"x10" piece of lexan over the hard plastic insulation on the inside of the lid, used long bolts with washers and nuts, then trimmed the excess bolt flush with the nut, towers dont budge at all...... plenty of clearance inside still.....
Fermenting: Squeeze my lemons blonde, Belgian wit, Lawnmower ale, Barley wine
Secondary: Chocolate porter, kolsch, lawnmower ale, Orange Honey Hefewiesen
Bottled: Rasberry wheat, Whopper Stout
Drinking: Hopzilla(wow), Gumball Hefewiesen, Blue Moon Clone, Leffe Clone