Using the editor with an adjustable standard (google)font and size?

SO is a super great plugin but I can’t use it. I’m busy experimenting with some plugins on the theme Sg-window Sg-double. The text generated by the editor is useless for me cause there is no way to use the same font or size as used in my theme.
As far as I can see I miss the possibility to ad Google open sans 16px in a way that all the content generated by the editor is standard with this font ore with any other font. I only see “alinea” with some head-text sizes. I know I could adjust my Theme font to the same font as the editor but that’s not the google font I want. It would also not very handy if I must reprogram all my content for every page in css.
My question is therefore: Can I get the editor to work with an adjustable standard (google)font and size?
It would be great for this plugin if this problem was solved.
I wish you good luck with this great plugin but I have to wait using it.