I'm struggling with making some repeat cross cuts on 70" long sheets of ply for a couple large cabinets and am looking for some ideas based on the tools I have. I initially measured, struck my lines and then did my cross cuts with the track saw but this isn't accurately repeatable and I'm off by almost 2mm on one of my panels which is obviously unacceptable for cabinets. I have a tracksaw, mft table, parallel guides and a table saw but am racking my brain on the right approach. The parallel guides for the track saw don't go to 70" and even if they did I'd be a bit concerned with some wobble at that length. The MFT would be great but my panel is way longer than fence and stop block for repeat cuts. My cabinets are also a bit wider than what is practical to cut on there. I've done it, but I can't latch the track down since my wood is wider than the table and I have to manually square and clamp the track each cut. I watched a video where Peter Millard has a table behind his MFT where he basically temporarily pin nails a stop block to the correct distance and then uses the MFT and track saw to make the repeat cuts. This is probably my most realistic bet though I'd need to make a temporary second table with some saw horses, clamp it all together and hope for no wobble and still fiddle with not being able to latch down the track right.
Hoping for some ideas on a better solution for this. Thanks as always!