[TowerTalk] Rohn 45 tower and base

[MIKE]

I am trying to get a 90ft 45G tower installed before winter sets in and the required base in the mfg guide is a CB1, 30" round or square (more concrete). Found out the hard way that the steel base plate hangs off the 30"circular pier on two sides. Digging into an older Rohn catalog, I found in the fine print that I require a 36" circular pier! Aside from this all the drawings I've found specs the pier pin to be "centered" whether or not you use a round or square form.
The 20"X24" concrete base plate pier pin hole is offset and the plate (and tower) will not be centered over the c/l of the foundation. Am I missing something here? 

Thanks, Mike K4EAR