So maybe I’ll go 160 and 180 too.
I wonder if it would be a good idea to have a third hole drilled in the middle on the 137/165 cranks. It would be at 151mm then so one could have 137/151/165. Probably too close together, right?
Might be better to take that crank and add a 110 earlier in, or the 127/150 with a 110. I think you’ll have to pick between 165 or 150.
137/151/165 is not possible, need some material between holes 
but 110/127/150 is feasible 
165 is the maximum possible from forging as same tooling for all Spirit cranks
I just looked at the pictures of the cranks again and it’s pretty obvious that it wouldn’t work. I’m not that interested in 110mm because it’s for a geared setup. So for the g26 I guess it’ll be 150/127 and for the g36 165/137 (no way I’m going to push the 2nd gear with 110s there).