Congratulations on your (new to you) Cat 22. I hope you have as much fun as I do with mine.
I have the same trailer. I wasn't able to read the manufacturer's name from the ID plate but was able to see the serial number and date of build. That was enough to get a plate (here in Michigan our secretary of state never checks little details like that). I told them I thought it was a Trailrite. They were only interested in the weight, about 660 pounds.
If you can make out yours, I'd be interested in finding out.
It works well, however, but those "baloney skinner" tires are only good for about 65 mph, (as per Carlyle). I fabricated a keel guide which makes it easy to float the boat back on the trailer.
I went through the whole keel rebuild process: new winch, cable, turning ball, volcano hose, new hangers, stainless bushing, pin, etc. You'll find that most of the play is due to a worn hole in the keel. Drilling the keel for the bushing wasn't that difficult. Getting the boat off the trailer and lowering the keel, however, was a real PITA. I borrowed a series of successively larger drill bits and did it by hand. After dropping the keel into a cradle, I just took my time. no need to use oil, cast iron can be drilled dry. Just be careful to keep the hole at right angles to the keel. I used epoxy to secure the pin. I also added the shims from CD and there's no wobble or clunk. If I can find the pictures, I'll post them but there's lots of good info on the site as to how to do the rebuild.
Once done, it will last for years.
Good Luck,
Tom G