I left 2.5" under the top to provide enough clearance for the Festool clamps to angle in. No problem with the clamps.
I built the island higher than the MFTs. It's at an easy height for me to work I am going to add a rail of LED floods over the island for better lighting for my old eyes.
On the left side, there is a pull out shelf that catches debris. On the right, I have to vacuum the Sustainer top occasionally. I have a double MFT that carrots most of the dirty work. The island is used mostly for assembly work.