> but there this is another interesting question. what size should
> the meters have what is the best compromise regarding
> space requirement and readability i think maybe 12hp is better than
> 8hp, but i'm not sure. any suggestions

The VU meters on my Behringer EQ would fit in an 8HP module, two of
them over-and-under. They're very readable, very attractive
circular meters with a large black bevel or cowl, and I'm sure they're
inexpensive (cheap!) if they're in a Behringer module.

There must be many stock panel-mount meters available that would be
similar in size and cost.

Not being an engineer, I don't know if this would provide adequate
space in the back of the module for a PCB, but is seems do-able to me.

Joe