Option to use PLA for Support on EXTERNAL Spool

I’m trying to use the PLA for Support on the external spool for support and then have Bambu Studio prompt me to load TPU that is non-AMS-compatible however that doesn’t seem possible.

I contacted Bambu support and they said it can be done"Only if the support interface ends at the exact height an overhang begins, and you can insert a pause and “color” change. Otherwise no, it cant be used. "

and they recommended I submit a feature request here. This is the reason I bought the PLA for support, to use it on the external spool for support on a large TPU print so I really need this feature.

Thank you!