guys, you need to know how the position algorithm is working, and that will tell you if increasing anchors will do anything to the location estimation accuracy.
In TREK, the trilateration algorithm uses 3 (tag to anchor) ranges to try and estimate tag’s position.
In PANS SW (DWM1001/MDEK), algorithm uses 4 anchors (actually gets 4 ranges, and uses sets of 3 at a time, then gets average) to estimate tag’s position.
Main point is: good data in -> good data out
By good data I mean, correct tag-anchor ranges (low error) and correct anchor positioning, good anchor geometry (e.g. having all anchors in one line will obviously not work as well as if you had them spaced out in a grid)
I am not sure why you thought that adding anchors would improve the performance of the system. Please try and understand how the algorithms work and that will tell you what could be done to help them get better location estimates. Note TREK algorithm is fully open/available in the GUI source code. The PANS one is not.