during trial fitting it became apparent that the column could not be fit in place . The elevator horn could not pass thru the consol rib cut outs . I checked both the console rib print and the contol column print and there are no errors - the parts have been correctly made per plans. I spoke with Richard Siers briefly on this matter and he advised that opening up the area was of no signifigance. I opened up on side with a sanding drum just big enough to install the column from on side.