TrainerRoad and Zwift together?

Anyone know the best way to run Zwift with trainer control off a PC and TR without trainer control?

Normally I obviously leave TR in control of the turbo and turnoff "controllable in Zwift. But I’m recovering from illness and I am doing some really easy TR rides, thought it would be more interesting to leave Zwift in control of the resistance and do the power matching myself.

Basically whats the equivalent of having “controllable” turned off in TR? Ive tried putting TR into “Standard” mode (instead of Erg), but something doesnt feel quite right, it feels like TR is still trying to take the resistance off