TK endura with bucher valve

When changing internal and external packings on a 3 stage with an i2 valve it’s easy to lower plungers by opening manual lowering and going in with down stop 2 or 3 turns. What’s a quick way to do this when there’s a bucher valve. The quickest way I’ve found so far is to using aux key switch but this is still very slow. I’ve tried playing with adjustments on the bucher unit itself while running down on inspection with no results. Is there a trick to this maybe by adjusting the aux. lowering system?