@wlutke are you utilizing the exact same digital input and output cables on the AM dac as you did with your Orchid - in other words did one cable/type change by chance?
Also did you ever try the other Tesla -or- Western Electric optional/recommended tubes in your Orchid dac?
The reason for asking is friends across forums shared notes about MHDT Orchid and Pagoda DAC findings with particular cables and tubes to fine tune results even more. Of those half changed caps to get even more out of the dac.