Are the arms on the Sheene cut like a motorcycle jacket, that is a bit foreward, or do they hang normally?
If I were getting a Sheene, I'd get it as it comes and only customize lining, leather and length. The patterns by Aero are very carefully considered for balance and/or period authenticity and I trust the company to make the right aesthetic choices. Unless you have a very good reason to change the pattern I wouldn't.
True, always true. However.... That 'vintage' slyle collar of the 'new' premium 1930s HB would look amazing on a Sheene.
http://www.thefedoralounge.com/showthread.php?78421-New-Aero-Premium-Slim-Fit-1930-s-Half-Belt