VSP Labs Trans Mos 150 - bias V needed

I put my amp on the bench to give it a cleaning & checkout.  I tweaked the offset to under 1mV.
Then I checked the bias of each channel by removing the B+ fuse and connecting a digital ammeter in its place. They were in the 300-350mA range at idle (zero signal), into 8ohm loads.

I don't know what the bias should be, and this amp has the reputation of running pretty warm--possibly due to a rather highish bias setting.

Anyone KNOW?