Yeah, the grub screw is what matters the most, in this type of application. Look forward to hearing your all's experiences.
I believe the motor you see in the picture below
would work well, if anyone wanted to buy one that had the proper shaft position. Only ships from HK's Int'l warehouse, but not bad for $25.
I bought it to try out in my short wheelbase SCX10 Telluride, after it struggled to get up a rocky, mountain trail, running a 2-pole Turnigy TrackStar 17.5T brushless inrunner, earlier this summer.
Pretty much all outrunners have no flat spots on their shaft, for those who are unfamiliar with them, so you have to grind one yourself, in order to tighten down a pinion grub screw.
A.K.A. rcdabbler on other social media platforms, and johnnyluv on rccrawler forums.