You are a persistent loader my friend. I had an NEC computer that was constantly breaking down. One day I had had enough and I tossed it out the second floor window onto the drive way. My wife thought I had gone nuts. Nope I fixed it...so I wouldn't have to spend another dime on that POS.
I don't know anything at all about that press, but if it is worth a damn then your issues are tuning. I learned a great deal about tuning in auto racing. There are so many variable in tuning a race car that no one can keep it all in their head. The trick is 1) Make only one change at a time, and then test. If things are better make another change. If things are worst, go back and make one different change. 2) Make detailed notes of everything you do, and I mean everything. If you took time to have a smoke before making a change write it down. 3) Review your notes often.
Sounds like that press is a finicky little SOB, and will need very fine tuning. If you make more than one change at a time and it is better, you don't know why. If it's worst you don't know why, and maybe one of those changes would make it better, but the other screwed it up so bad you can't tell. I would say put the machine to the best tune you have found. Write that tune in your notes. Start making changes ONE AT A TIME from that basic tune. If you are disciplined about following the above advice you'll eventually get it as good as it can be. And if you make notes you'll have a base tune to return to as it wears.