The supply temperature was at ~21K, return was at ~27K, both loops are steady ~ 30K. Switched to cold-return. After the switch, supply went down to 16K (still decreasing), return went up to 47 K and stabilized and started to decreasing.Flow dropped from ~8 g/s to 7 g/s. Are waiting for ESR to stabilize, will then increase the flow to continue cold-down.