[Confused Re 2xLC]

Which GM5 will I need?

The 5/5 or the 1/1?

[Confused Re 2xLC]

So I've spent some time doing some reading, and I beleive that in the coming weeks I'll be ready to start my project.

The plan is to have a 16channel motor fader board plus one master fader. By my understanding and calculations I will need the following:

3x PIC18F452 cores - 8 faders max on each core, therefore I need three. Right?

4x 2x40 character LCDs

6x DOUTX4s

3x Motorfaders (right? 8+8+1?)

Here is where I am getting confused. I've crudely worked out that I need 6 DINx4s with the following logic:

Since I only need a single master section, a 2 LC design doesn't need twice the buttons that 2 single LCs would have.

And, as aach extra channel contributes four switches, an extra eight channels will contribute 32 switches.

Therefore i should only need an extra two DINx4s right?

Also, do these three cores connect individually or are they chained somehow? And on extension, how many LTCs will i need? One or three?

Thanks for your help. I'll keep looking over Axel's posts while I wait for replies :P.