Nice job, very, very nice. Your note says it has the pneumatic release, could you have done the release like is in Swish? That would save you the weight of the tank and the cylinders.
On the first view there is a light green 1x2 used to tie the 1x uprights together. Since corner parts are “free” you could use a 2x Wide, 2x2 Corner Connector or a 2x Wide, 2x3 Corner Connector at that joint (and the one just above) to make it a little more rigid. But an excellent way to finesse not having 2x beams.
I also like the use of the long axle parts to keep things tied together from side to side.
The use of the PTO is pretty interesting idea, if I get some time after Sugar Rush I’ll try to make it.
You are very welcome, I’m very pleased with all the entries. There have been a few other very successful contests. I love the Clawbot II one that produced the "Octoclaw" as an entry. There were also some great 2019 entries to the Lunar Lander competition.
Still a few hours to go before the deadline, lets see those final designs.