Hey Slicko, SHB are like fleas on a dog down this way and I am now using Apithor bait stations and they seem to work well. I have learnt through two hives losses to tilt all hives slightly forward so any rain or moisture drains out. It you don't the bait station gets wet and the SHB won't enter them, and it turns to slime in a week.
Cheers
Steve