wow wow wow wow they look very very nice.
Mine is very similar I must have a leak or perhaps my carbon needs to be repacked tighter.Hey bro if it helps, I'm now blowing and everything is a-ok. Even with my crappy ducting, no smell can leak out unless my duct tape on the fan fails, which it won't. It's blowing into the filter, but sucking from the cab so all the ducting is negative pressure.
.
It's a 92mm delta fan. I suspect pulling was traditionally suggested because it's the most likely way you won't eff the pressures up. As far as the efficiency goes, I wouldn't worry about it as long as you have a prefilter. Glad you're happy with the 11/13! I'm gonna give it a go this run.
If that doesnt do it I am thinking of getting an order sock because my girl's only rule it " I don't wanna smell it like last time"
Some strains turn purple if temps get a little low, but usually only on stems and leaves.
My night temps drop to about 65F and some of the Satori stems are completly purple.
Now, some of the new leaves are having a purplish tint as well.
Also, purpling can be a sign of N or P deficiency.
There must be something to those CMH lights. Your plants were monsters while in veg. I'm growin sam's OHxS1 too. I'll be tuned into your grow to see how long it takes to finish.
SS