Have just read through you work log, looks really good, this will be the first res like this that I have seen, onto and outside of the case.
Have you thought about using Solvent cement to join the perspex with, as the solvent melts the perspex together it makes an exceptionally strong and water tight join.
Providing all edges are a close fit and solvent cement is applied to all edges.
Worth a look.

Looking forward to your next update.