Joecar mentioned using the WB02ben exclusively for tuning both CL and Open Loop. I am 99% sure that the way to do this is to modify the iff statement for SELBEN. I have replaced Calc.LTFTBen with Calc.W02BEN like this:
"iff({CALC.CL}, {CALC.WO2BEN}, {CALC.WO2BEN})"
Thought this might help someone. Can I get a few peeps to confirm this for anyone else that is looking for this info?