VSX J064448.1+210222 - another brick in the wall...data from K28
Walt Cooney put AAVSONet scope K28 through a semi-tough test recently - collecting Sloan g' and r' data on a mag 15 variable that he discovered some years ago.
Go to http://www.aavso.org/vsx/ and search on VSX J064448.1+210222 scroll down to Supporting Documents to see a phase plot.
Not too bad for an 11-inch SCT on a commercial fork.
More data on similar targets is being collected as I write this....