Thanks for your response. I have several Boogie Amps. F-50 and Studio Caliber with parallel FX loops and a Mark II B and TA-30 with series loops. I find a general struggle getting optimum levels on the Eclipse as channel volumes also control send level. Seems if I had more control over the gain in the loop it would afford flexibility not so governed by the amp volume. The Mesa article you cite suggests trying their line driver with 12 db boost might be beneficial in the FX loop so I though perhaps go a step further with the Eventide Mixing Link. Is there benefit to be gained by using the balanced output from the Link to the Eclipse?