Yes we need to replace the chain that is all the links so now we know the baler works good we will start replacing some things. It needs a few pics up teeth would it hurt to put the curved ones on? And I read that it’s a good idea to replace the front chain every season. Also it needs some bushings I think on the packer forkCongratulations. I remember when 224 balers were replaced with 336 & better model 346.
I suggest you lower bale chamber extension a chain link or maybe 2 or 3 links so bale will be lower when it touches the ground & bale won't be deformed exiting bale chamber