RFB and the 3dTDC are not compatible. I tried to integrate it into RFB at one point, but there are two many nodes. The only way to get it to work with RFB is to instal it after RFB. Although, as I recall, you will see it breaks a few things.
TMO 2.5 has the 3dTDC integrated into it.
As to the realism, the PPI display in all mods is a compromise. The big advantage of the 3dTDC mod is that it allows you to get accurate range/bearing to targets via the A scope which makes radar only attacks possible.
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