Thank you both so much that is what I was missing. It makes sense now that the seals are leaking and causing the pressure to build popping off the vent line. Now to find some place to replace the seals.
The 2 post would definitely make several jobs easier. But I went with the 4 post because of space I always have something stored on it. It's more stable. Also, I like the ability to move the lift around. It's not bolted down which makes it not quite as solid as it could be, but my needs...
UNfortunately Mindy and I have plans with another family than can't be moved from that weekend. We'll have to join the next time around.
Have fun storming the castle.
I'm with Glen. $20 seems more than reasonable. I always thought $10 was cheap considering the support we give to Blue Ribbon Coalition and Tread Lightly.