LOL ditty just take a valve stem tool and unscrew the valve stem. They come for free!!! on the tops of SLIME bottles or you can use a really small pair of tweezers. YOu can loosen it until it's JUST about out and it will stay in but allow the air to escape VERY quickly.
When are you going next time? Let me know we'll have to meet up and drive out together. Also, the tag would it be possible to swap it LOL
Looks like others were saying 15psi... I believe I was saying 20 and you ended up at 25 but didn't have any problems LOL so that's all good!