Report Flirc Case compatibility in General Questions Posted March 23, 2018 After posting I noticed that. Shame the mechanical drawings don't show height of the CPUs. Do you have a 3B+ and case not-in-use? I am wondering if you can shine a light through one side whilst observing through another to see if they touch. Alternatively some thermal paste (normal CPU stuff) might be enough to determine how 'tight' the fit is. If yours are in use, not to worry. It's only a potential £15 loss for me to buy them both and test myself.