The first thing I would do is take some photos. I would then contact the seller and send them the photos. If pretty much every hole has a crack, the scales may be defective
Post the photos here so we can see the problem, as well.
Did you torque the screws down too tight?
Thin CA could make it better visually, but the problem may not be fixed. Done wrong you may have a mess.
What I recall about Ultem is it that it is amber color, tough, but can be somewhat brittle. It will develop cracks if exposed to certain chemicals. Its advantage was being a plastic with heat resistance and electrical insulation. IIRC, it was mainly used on medical stuff.