I disassembled the valves and lines yesterday to be able to turn the logsplitter valve off to remove the fittings. When I got all the fittings off, the first thing I realized was that the fitting for the power beyond port that came with the valve is very thick and reduces the flow to a little less than 1/2". The only fitting that will go into the fitting in the power beyond port is 1/2" and then they upped the fitting to 3/4" to get into the logsplitter port. To me, the power beyond port isn't able to deliver the same flow as it receives, but that spec isn't listed anywhere, so I don't know for sure. I ended up just putting it all back together the way that it was. When I took it apart, there was a large piece of plastic wrap in the power beyond port, so it wasn't a complete waste of time. I'll be changing the filter fairly soon as I'm sure it's not the only one that got in there somehow.
So I fixed both leaks, put the valves back together and started a much bigger test than what I did in the video. Here's the good and the bad:
The good:
I was able to process what I think was the 2nd biggest log in the pile. It split no problem, but the pieces where a little on the large size and will need to go through again. There was no jamming.
I was able to process full, 16' long logs,... just! They stayed on my log rack but the large ones where difficult to roll into the trough.
The cycle time for the splitter improved as the fluid heated up.
I had several good pushes where the pump went into high pressure and even maxed out once, and everything stayed together and straight. The areas of concern have been the attachment point of the cylinder and the bracing for the box splitter head, both survived and the machine successfully withheld 53K # of force.
The pusher plate now consistently returns after it stops when I engage the roller system to advance the log. It was kicking off, now it just takes a little break before finishing the retraction.
The bad:
One large not so straight log with big knots wouldn't advance with the rollers. I ended up having to coax it a little with the tractor.
The saw got a little loose on the mount and I ended up cutting a 1/2" groove in 1/8" steel plate

I don't think the chain is salvageable, but I'll spend some time trying since it's brand new and had never even been sharpened!
And no test would be complete without a show stopper! Right when I realized the issue with the saw, I noticed steam coming off the 5" cylinder

I ran for my point and shoot thermometer and got a max reading of 153 F off the outside of the tank. Princess Auto assured me a 10 gallon tank was more than sufficient at the time, the hydraulic shop I ended up using after realizing Princess Auto has no idea of what they're talking about told me it was well undersized.
So here's the tank I'm thinking about using:
37.1 GALLON HYDRAULIC RESERVOIR . Anybody have any opinions on tanks? I'll check my local hydraulic shop to see what they have, but since two 2' hoses were $140, I don't think I'll be able to afford one of their tanks.
I also need to build the off shoot conveyor. I have a 6.5hp engine I'm going to use for that. I was thinking about going hydraulic since I'm re-sizing the tank now, but I'd either need to replace my engine with a larger one, use multi segment pumps in addition to my logsplitter pump or add a second engine and power only the logsplitter with one and the rest of the hydraulics with the other. Since I already have a spare engine, I think I'll start with that and save the $1500 modification.