Just wondering, Is it harmful for my P3S battery to discharge several times without actual use? What I mean by this us I have charged up my battery several time only to be unable to get out, thus the battery discharges (set for 3 days). It has been charged and discharged 3, times, is this not good for the battery?

I'm thinking the bigger issue would be keeping battery at full charge.  Will tend to eventually cause it to "puff".  At that point battery is pretty much spent

Not hurting anything in the big sense. It does use battery cycles, just like you used the battery in the same amount.

You could always set the discharge period to 10 days, or if you push button to check charge I believe that resets the day counter to zero.
You will not harm the batteries by doing what you are.

I have set to three days as I have read that the longer it stays fully charged the harder it is o. The battery but by setting to 3 days I find I'm recharging a lot, only get weekends off to fly so charge on a Friday night on hopes I get out on the weekend, when this plan fails I know it will discharge on Monday then have to do it all again Friday.... If I change to any other cycle really doesn't help... Tks

I hear ya with only getting to fly on the weekends. I usually will get up Saturday morning and as soon as I know I have a little time later I'll throw 1 on. Like stated above it does no harm doing what you are doing, the only negative is you'll eventually shorten the overall life of the battery.