I have a brand new Dovo Micarta in white and almost all of the rest of the gear needed for a quality straight razor shave. I just received a Rooney S3S2 faux ivory shaving brush in the mail and am itching to find a suitable scuttle. I'd like to find one that is good for spinning up warm lather in, using the Proraso shaving cream I have on order.

I'm itching to start learning. Let the nicks begin!

I'm strongly considering pulling the trigger on this Steve Woodhead:
Large Wet Shaving Scuttle #2 Ivory - Shaving Mug / Bowl / Scuttle

It is competitively priced and appears to be very well-made.

Questions-
1. Is the #2 a good size? I've never made lather like this, but feel like a wide opening is good thing. He has a bigger one, but I wondered if it would be too large.
2. Am I going to regret not having that little "sidecar" like I see on an Oskar?
3. Why not just immerse a shaving mug/bowl in hot water, take a shower, empty the mug/bowl and the sink, refill the sink a bit less and sit the mug/bowl in the water to keep it warm? I'm guessing that isn't as convenient as I sounds, splashing, wet hands, etc...
4. Am I correct in assuming that the scuttles with a smaller diameter are mainly for brush warming as opposed to building lather in?