I would love the list of model numbers! Trying to compare scopes I see listed on eBay to determine what works well in XY mode:
EICO Model 460
Tektronix T921 (single channel but still has XY switch - compatibility unclear)
You can see previous work I’ve done with Oscilloscope Music here:
https://www.lovetech.org/osci-station
Thanks,
Rich DDT