Hey Sub, welcome to AC! The only drawback to permanently sealing the quick release to the head of the unit is that when you want to clean the thing, you'll have to drag the hoses along.
You might try getting a new set of O-rings since this has happend more than once. As I stated previously, when I had it happen to me, it was my own fault. I had the filter too far forward in the stand which put pressure on it from the hoses going out of the back of the stand. After that, I started using vaseline on the o-rings for safe measure. The odd thing is, when I bought a new XP3 (because they were on sale and I could, plus I wanted a spare just in case), none of the o-rings were lubricated. I have yet to put anything on them and yet to have any leaks!?! Thicker o-rings on the new units...? :huh:
You might try getting a new set of O-rings since this has happend more than once. As I stated previously, when I had it happen to me, it was my own fault. I had the filter too far forward in the stand which put pressure on it from the hoses going out of the back of the stand. After that, I started using vaseline on the o-rings for safe measure. The odd thing is, when I bought a new XP3 (because they were on sale and I could, plus I wanted a spare just in case), none of the o-rings were lubricated. I have yet to put anything on them and yet to have any leaks!?! Thicker o-rings on the new units...? :huh: