Ken, I have exactly the same between Direct and Trifield. There is a thread on the subject (at least one). It discusses phase and distance setting (where 1/2 takes it out of phase and another brings it back) and positing of the centre. An interesting read but I haven't been able to implement a fix (yet) for me. I have a 5KC with 6K L/R so I blame the loss on a mismatch centre. I end up listening to Direct.

Tintin