STAR grounding point

effect of stray ground material A
worse effect eg : GND pour

effect of stray ground material B

effect of lousy return wire

10R GND link sitting on lousy return wire

adjacent effect even on STAR GND
least effect on directly opposite arms

feedpoints directly on opposing side of GND spot (a small via?)

sanity check. connect at 90degree entry

another sanity check slightly different trace