MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
These are great. A few notes after much experience with Maker Select & related issues.
A glass bed and these clips are basically necessary as the Monoprice Maker Select print bed are all warped and crowned. Mine was crowned so bad that printing any part over 40mm a side or less then .2mm layers was difficult. The glass bed instantly fixes all those issues.
In short, replace the Y-carrage with a stiffer plate any you will never have to worry about leveling, then get the glass and print a few sets of these. They are meant to just hold the glass from moving in X/Y so they don't need to be tight and don't hold the glass "down". When leveling the bed place paper shims under the corners to remove the crown/flexing of the glass when you press down on it. Doing this means that when you remove parts the glass won't slightly change angle and require a re-align.
As for printing these I recommended a much higher then normal infill/wall/skin to give them a bit more longevity as the build plate heat and temperature changes can easily cause them to deform. And if the fingers don't hold tight just add a folded paper shim. You should be able to wiggle the glass in X/Y but not see air games from he fingers to glass.