Color phases aren't morphs. Morphs include the hypo, tarns, leatherback, etc. color phased dragons can be normals bred for bright colors.
However your dragons nails appear to be clear which would mean he's a hypo. Trans would be all black eyes. He's not a leatherback or a silkie or a paradox...
Thinner the plexiglass the more flexible it is. I wouldn't use something that thin. 1/4" plexi is .250.
.093 is really thin stuff. I wouldn't use it. I just built mine and I looked at plexi but a sheet of 1/4" plexi big enough to do,what I needed was going to be like $50. I just got some glass...
You should get a good non contact thermometer. I got mine at lowes and it's very accurate. A lot of them only read correct temps if you have it at a certain distance from the object. Usually about 2".
Mine reads about any length. It was about $30 some odd dollars. We'll worth it for it to give...