Yes that PSO is one of the first pumps of 26no.
Cant say about G11 but i get same amount of gas from g-9/4 usually.
If the pressure is 180-200, i get 8-9kgs. If it is 220 as sometimes at g-9/4, then i can easily get 10.5kgs. So to me their pressure is fine. Pretty much same as that of GT road pumps and G-9/4 pump (because i have tried those)
My last tank ended up at 162km, which 30km of AC and 30mins of idling with AC. Mileage i got was around 17.5km/kg, its little lesser then my usual average because this weekend i drove more in local
My conclusion is local pumps (within city) have low pressure, long queues. If it is possible, try getting cng from highways at off timings. e.g 26no, gt road, expressway