Short, screech when starting, but it has to be hot
Yes - and in my case only after 80+ miles plus constant.
As I have been only using the scoot for short commutes of late, the problem hasn't recurred.
Therefore, there isn't a problem :-)
P.S. not sure roughing up anything with with emery paper is a good idea - look at what happened to Ol' 2 Wheels :-)