I'm getting more excited about this, too. I don't want a 24 hour scale on the dial either. The reflector with orange numbers will work much better. I don't think we have to worry about making the 24 hour markings visible underwater, but they should be large enough for a 50 year old guy to read without extreme magnification! I think a long GMT hand like the G-1 will work well here, especially if it reaches all the way to the reflector.
The plan is to make the case 44mm diameter not including the crown, and around 13mm thick. The case will also be designed so that we can fit the 2824 at a later date. The case has to be machined for one movement or the other, but the same mold can be used.