For my existing webshop: [url removed, login to view]
I am going to use variation within these products. I will new offer each product in a "uncalibrated" and "calibrated" version at different costs. I tested the functionality and it works. The only obstacle, the representation is not nice.
1) Product variation now
2) Preferred arrangement => Design of the single components is ok. It is purely about rearranging the elements
3) Settings in Webshop (WPEC)
13 freelancers are bidding on average €43 for this job
I will redesign your full site on wordpress with full functionality as required and also good user friendly CMS. On demand I will show you demo of ecommerce site on wordpress.