@Cherl cool. I've been doing something similar, can't make up my mind if i'm a 5 minute or a 10 min yet but might do 10 then release for awhile and see if it works. also 3-4 months? I'm guessing you went from B or C to D? pretty good time frame 
@Wishful I seem to be mixing you and Cherl's method, I slowly get them there by randomly pumping whenever I think I can do more untill the max (being very careful), then wait 5-10 minutes and deflate
I try to do 30 min-hour depending on what kind of time/privacy I have (funny to see me going "abort! abort!" and deflating and tossing the stuff in the bag and putting it up)
Thanx for your advice
@Wishful I seem to be mixing you and Cherl's method, I slowly get them there by randomly pumping whenever I think I can do more untill the max (being very careful), then wait 5-10 minutes and deflate
I try to do 30 min-hour depending on what kind of time/privacy I have (funny to see me going "abort! abort!" and deflating and tossing the stuff in the bag and putting it up)Thanx for your advice