There are a few companies that make logsplitters that will mount on your 3PH (3 point hitch), and you could power it from on of your loader ports and bungee the joystick. But with they available GPM output of your 2305 the splitter will operate very slow...
Do a search in the "attachments" forum, this is one of the more frequently discusses things.
I saw a contraption a guy is making and selling that hooks onto the fel and runs off a pto powered hydro pump with it's own reservoir that was down right awesome. He had it on a 2210 or 2305, can't remember which, but he cut the logs to length then picked the pieces up with this thing and split them straight into the bed of a pickup.
I've got the speeco from tractor supply. My 790 is 5.6 gallons per minute. The gpm is what determines the cylinder speed. Its a little slow on mine but not slow enough to be a problem. And it rarely bogs. I've had it a short time and have run through about 8 cords. Very Happy. Didn't have to spend 1800 on a standalone and don't have to borrow sh*t
I had posted the following question in the hydraulics forum.
The listed valve seems interesting for small tractor owners(and larger tractor owners who don't want to run the tractor at WOT). It is apparently a regenerative valve, and looks like it could be retrofit on most splitters.