I had contact trouble (timing issue?) with the MZE and my Mighty Mite VFT. Tried it every way I could - never could get the contact to stop. I still have the rest - wish someone from muzzy could figure this out so I can switch back from the WB. The WB is great for inside 25 yds, but the groups open up to 4" beyond 30yds - unacceptable[>:].