I recently purchased a used, pristine 4 month old, Fender clone made by a highly respected boutique amp builder. I don't want bring any bad PR to him, so I'm reluctant to divulge his name. When the amp is cool, the control panel lays flat against the chassis. However, when the tubes heat up, the panel bows out away from the chassis. I looked closely on Mojotone's website and it appears this is one of their acrylic panels that can be custom engraved. The area circled in red below is where the bowing occurs. Has anyone seen this before? If so, what is the fix, if any? Thanks for any help in advance. BTW...I posted this in the "Amps and Cabs" forum as well for more exposure. Hope I'm not breaking any rules.