rockhard,
I doubt that you’d lose much if any of your gains. I’ve completely stopped PE for a full year and never lost any gains. You might lose a little in the first couple of days, but that is just swelling going down, and not real gains.
When I first started PE, I gained .5” length and some girth. I plateaued after about two months and didn’t gain in the next three months when I decided to stop. A year later I joined Big Al’s site(forsize.com) for additional motivation, and gained another .5” length in a fairly short amount of time. That too plateaued, so I took another year and a half off. My flaccid size did go down some during the time off, but it still was at least twice as big as it was pre-PE. I didn’t do any sort of “maintenance” during the time off.
I am now going for some more length, but emphasizing girth exercises this time. Total gains to date are about 1.25” BPEL, and .4” girth.