Another 4 inch Tak? Why not a FC-125 or FC-150 or TSA 150?
Given Takahashi's preference to re-purpose already designed components, a FC120 in a 114mm tube, or perhaps a FC FC130 in a 125mm tube seems most likely the next possible offerings ( if the light cone & baffle math works out?).
PS If it were offered? a FC120 in a 114mm ( FS102/TSA102 tubes) ( perhaps with the Sky90-2.6" focuser to save weight? ) would be my favorite!
Imagine a scope the size & weight of a FS102 with a 120mm lens.
Edited by tomcody, 17 August 2015 - 10:14 AM.