Powermatic 64A Blade alignment Problems

I’ve read some posts on blade alignment on the PM 64A here and across the internet and have concluded my issue is not uncommon. Having owned this saw for over 15 years, I’ve had no issues until recently. The rear of the blade is closer to the miter slot than the front by 0.005” confirmed by a dial indicator. I’ve made sever attempts to adjust the trunnion set screws to bring the table back into alignment but even if I get it, it tends to revert back to the original position and it’s nearly impossible to get true zero, front to back.

Another weird thing happens following successful blade straightening with the blade at full height. As I lower the blade back down to my operational height (1-3”), the blade somehow drift back towards the miter slot. I tried another blade and it did the same thing. And I did check for square, which it was. So basically the blade will only maintain a ‘straight’ position while it’s at max or near maximum height.

I spoke briefly to Powermatic today who suggested the trunnion adjustment is not what I should be adjusting but rather the link bars. aka Tie bars on the delta. I’m not entirely clear what I’d be doing there, so I’ll probably contact them again tomorrow for more clarification. Also the nuts on the back of the saw on the link bars are incredibly hard to loosen and very difficult to get wrench on them. I’m open to your expert opinion as well…

Finally, I think the PALS will be worth trying. I will be purchasing a set to see if that does it. Looking forward to any feedback or suggestions.

Shawn