I've been eyeing this model for a couple of years, and wish I had one. I might have to just order one.
Here is a notepage on contruction tips or suggestions. Decide for yourself if they are relevant.
http://users.rcn.com/llfc/se_tips.html
I've seen several Sig Something Extras, and they always are impressive. Just a good sport plane with a sprinkling of scale. It's a good design.
I would like one.
Enjoy the building process, and good flying.
Tom