While this may be slightly off topic, since you're still in the process of putting things together, as your main concern appears to relate to using an Incra LS Positioner on a router table I thought I'd add a possible alternative to the mix. I purchased an Incra LS17 Positioner and a Rockler router lift in 2006,
i.e., well before I purchased my first Festool product (a Domino Joiner) in 2007. I then built a router table using melamine, and while I know that I will receive many comments about that, the fact is that it's worked great for 13 years. I initially posted my setup in 2009 at
Home Brewed Router Table.
More recently, I replaced the 2x4 base with a
Folding MFT-style Bench with Router Table that is also described at
Portable, Folding Workbench With MFT, Router Table, and Other Tops.
The system works great. It's portable. The tops are interchangeable. And, to the melamine nay sayers. My comments and opinions are based on 13 years of actual experience.
Sandy