It’s not that straight forward to just increase the number of anchors.
You would nearly have to rewrite the code and locating engine.
Please study the TREK source code in detail to get an understanding of the code , eg addressing , TAG to Anchor and anchor to anchor communication and more.
For example tags only poll 4 anchors (0-3). If a different operation is needed (i.e. increasing number of anchors > 4) then one can rebuild and re-design the code for their application by studying and using the code we supply.
I’d also suggest you to purchase maybe and MDEK1000. It will seriously reduce the R&D man-hours spent.
/Leo