Have you tested this in switch mode, to make sure the game optos sense every side?

Also you made need to update the roms. TOM has all kinds of issues with the trunk that was altered throughout the different versions of roms. I think the latest is 1.4x, but I'm running 1.3, I can't recall why, but I remember researching and there was a reason to stay away from 1.4's.

I have my thoughts on this but in all honesty I would much rather hear from one of our more savy members. I know someone here will be able to help you eroomnek. Welcome to Pinside.

I would also suspect a component in one of the Opto circuits is failing over time from heat.
Put the game in switch test and let it sit for about 10 -15 minutes, look at the display and listen for a bong noise to see if a switch triggers itself.

I had many issues with my trunk until I bought one of these.
http://www.pinbits.com/index.php?main_page=product_info&cPath=13_33&products_id=375

They say sold out but I called and they had one to send me. It was a couple months ago though. It cleared up trunk errors, and the problem you are having. Not one problem ever since.

I had this problem on TOM as well. In test mode it became clear that one of the optos was not registering and would spin forever (winding up the cable!!). I took it apart from the underside and simply cleaned all te pieces including the optos. I have not had a problem with trunk rotations since.

Give it a good cleaning and if you still have issues try to determine if one of the sets of optos has a bad tx or rx.

As for the eddy board from pinbits, it's an excellent board but it does not affect the trunk rotations. It only affects the calibration of the sensitivity to trunk hits. So if you're hitting the trunk and it registers your board is calibrated.