This happened last year on any setting I used in CFM from 51-54...
They came in bunches or not at all...
It'll be interesting to see what a larger sample tells, but I'd leave it at 51 / accumulate a decent sample and then either leave it alone or go with 50 or even 52...
Higher = Mo Better (IMHO) with regard to them "exploring options" (secondary receivers / checkdowns / scramble) after vetting the "red route"...
Too low and they just stubbornly stick to the play, often to their detriment...
It's ALMOST like some of the effects of the former IG slider got folded into this one...
#balancingact