I think I posted this somewhere else, but I'll do it here, too...
As you apply throttle/collective, the swashplate is actually pulled down to increase the blade pitch, and it is pulled down equally by all three servos. In normal mode, with the throt/collect. stick all the way down, your rear servo arms should be level with the swashplate or pointed up slightly. The swashplate should also be pretty much perpendicular to the main shaft in all views, and the top of the swashplate should be just a hair over 3/16" below the bottom of the plastic blade hub, like 13/64". to make all this happen, you'll have to remove and shorten the ball ends accordingly, and maybe reposition the servo arm of the servo you replaced the gears for. If you were like me, you put it back on a spline-tooth off
