Thanks Ted.

Your 3rd paragraph helps me with a possible plan, to try TurnPath.

New field, with correct outside boundaries [done with TerraStar C-Pro, last Dec] = start with SmartPath and plant headlands(drop marker on East side of field during 2nd pass); Switch to A/B line for East side of field (internal) and manually drive and create an A/B guidance line. {TerraStar C-Pro corrections}

Try TurnPath, if I get their "Free" 24 Hr Demo.

Note: I'm a STO, so I'm not even sure, How much benefit there is for my situation. 3 days on Corn Planting and 2 days of soybean planting, this year [JD7200 8/15 planter at 25.3 ft wide in 38" Corn and 23.75 ft wide for 19" soybeans; pulled by JD8410 MFWD]
I've always got along fine, spraying with 65 ft 3 point "X" fold boom and JD4440; and just engage AutoSteer {even on WAAS}