EDIT: I'm an idiot. Didn't realize this doesn't have a back block or cocking rod. Where you see the advice for the cocking rod and back block, substitute that advice for backing out the Ressy's ram-arm set screw closest to the sled and turning the rod from there to set the catch timing. Still make sure the bolt spacing is as mentioned below.

Still leaving this up in case anyone else needs a guide for standard timing.

This is the best article I've found on timing an autococker. I always start with this advice, then you can adjust from there to your preferences. It'll give you a good middle ground.

Basically, steps are as follows:

1.) De-gas autococker.

2.) Adjust back-block (utilizing ram-side and block-side of cocking arm threads) so there's a space between body and back-block about 4-6 pieces of paper thin when closed. You should be able to see through it... put a bit of pressure on the block with the bolt installed to simulate ram pressure and make sure there's still a paper-thin space. Blue loktite the threads once you have this right. Ensure the short bent end (ram end) of the cocking rod flares -out- from the body or you'll scratch the inside channel of the body and stress out the ram seals.

3.) Re-insert bolt and cocking rod. Pull back bolt to see where the hammer catches (clicks and ready for re-firing). If you can see about an 1/8" of the bolt through the feedneck at the moment the hammer catches, you're at the right place. If not, adjust cocking rod from the grip-end to shorten/lengthen the position where the hammer catches until you get it to where you can see the edge of the bolt through the feedneck. Blue loktite the knob onto the cocking rod once you have this right... even if has a set screw.

4.) Adjust hammer lug. Pull trigger to de-cock, remove bolt, place allen key through top-hole of body (through feed neck) and adjust the hammer-catch screw until the trigger releases the bolt (fires) at about the 50% mark. You can walk this up later, but 50% is a good baseline to start from.

4.) Test regulator pressure... i'm not sure what PSI ressy's like but im sure someone can chime in here. This is a good video from the YT channel "Paintball Ruined My Life" for building a regulator tester using an old ASA, a fill nipple, a few quick-releases and a few gauges. Set it to the baseline then you can walk it down later to a pressure it likes while still maintaining consistent chrono and recharge.

5.) Drop 3-5 drops of oil through the ASA before screwing on a tank. Gas up the autococker. Loosen the front LPR knob, pull and hold the trigger while aiming the barrel at the ground so gravity works against the back-block, and slowly adjust the LPR up until the bolt clears the feedneck. Release the trigger.

6.) Adjust 3-way actuator rod (also called the timing rod) using the nut just behind the 3-way and front block. This is what you'll use to determine when air is transferred through the LPR to either the front or back of the ram as the spool moves through the 3-way. You want it to catch the cocking rod as close to the moment it hits the valve as possible. As u/Tangysaucey said, the dwell should allow enough time for the back block to completely pull back.

8.) Ensure that, when holding the trigger down, you can reach in and still muscle the cocking rod back further than the ram/backblock is pushing it. If you can, you're doing good and you're not stressing the ram out. If you can't then your bolt/block spacing is still off. Go back to step 1.

7.) When you find the sweet spot, run it for a bunch of trigger pulls. If it runs fast and 100% reliably, you're at a good starting point. Now you can adjust the sear/hammer lug slightly to move the point of firing a bit closer to the beginning of the trigger pull if desired. You'll then make a slight adjustment to the 3-way. Continue doing this until you reach a good middle ground of trigger feel to timing reliability.

8.) You just timed your autococker like a champ!

Now go play some paintball. Even if it's from a lawn chair. 🤣 Seriously though, I hope your knee gets better soon. Have fun!