Solved for now...
I kind of reverse engineered this problem to solve it.
I added the fields using a known working session variable, then entered the RecipArray variable directly into the code on the email page.
Once I entered the wizzard again I found the issue to be, wrong quote type used:
Suggestion from the forums was:
<?php echo($RecipArray[$RecipIndex]["YourColumnHere"]); ?>
Only this actually works:
<?php echo $RecipArray[$RecipIndex]['YourColumnHere']; ?>