Wanhao Duplicator i3 Z-Axis Stop bracket

I recently purchased a PrintInZ print bed for my Wanhao Duplicator i3. It's great, but it's thick, so you can't get the built in bed down low enough to get the PrintInZ bed in without adjusting the z-axis stop switch. There are two sets of mounting holes, and I found neither worked. There is a bracket that you can get from the Wanhao USA website, but I found that it didn't really work well. Once the screws were in place, they would slide up and down. There's a copy of it here on Thingiverse