Curious about combining vests with kilts without going full formal. And yes, I know there are several threads on vests, but the information is generally on more specific aspects of vests and I can't seem to put it all together in my mind without some basic groundwork.

I've got several vests from historical reenactment-type uses, mainly targeting American fashions of the 1900's, the 1920's, and the 1950's (I restore old cars, play ragtime piano, and volunteer at a railroad museum), so I have a number of vests already. But then I see folks on here who have specific ideas about combining vests with kilts. Some of you guys have tweed vests in some of the other threads that look great, but I don't know how to properly get started with one. So, I have several questions:

1. Do "normal" cut vests work well with kilts, or do they really need to be shorter?

2. What are the differences between more kilt-specific vests, such as (just looking at USA Kilts) an Argyll, Prince Charlie, Kilkenny, and some of the other ones I see on here but can't remember the names of?

3. What kind of a vest do you prefer when not worn with a jacket?

4. How about with a jacket, not for piping or full formal events but more want-to-look-nice-but-it's-cold-out?

5. If you were to recommend a color to start with, what would you recommend?

6. Any other pointers, such as on material or sizing?