I am in the same boat, only problem is I have 2 1/2 inch tower, however seems I am out of luck on getting the extension. I only see them for 3inch diameter. I saw good price on the net for 3 faucet tower for $150 direct from manufacture may just pull the trigger. By the time I drill buy two additional faucets and and shanks $100 I feel I may be better off buying one for $150. Plus three faucets coming off of a 2 1/2inch column seems kind of tight. Plus I could always sell the other tower.