A track saw would give you a straight edge and depending on the blade would possibly give an edge with minimal cleanup.
I was going to recommend a track saw, but cutting a 60mm thick panel would require something like the Festool TS 75. I cut glue-ready edges in 60mm thick walnut slabs for a friend using the TS 75 and Panther rip blade. It was easier to take the tools to him rather than drag the large slabs to my shop.