Hi Jim,
Sit in your listening chair, have someone measure the distance from the floor to your middle ear.... Normally 38 to 40 inches... whatever that height is, look at your Warfedales, with a crossover point of 2.3khz and listening to them straight on, not tilt, I would recommend that you put the height halfway between your woofer and tweeter at the same level as your ear... so if your ear is 38 to 40 inches off the ground, then place the halfway point between your woofer and mid at 38 to 40 inches. That will determine your stand height. I hope this helps,
Tim