Hi Karl,
Email me and I will respond with photos. There is no need to build-up anything because the cooktop has no built-up edges.
It is all glass and you can use a pot larger than the width of the cooktop if need be. Of course, performance will suffer, if the pot diameter is larger than the actual coil. Also, bear in mind, that you can not just use any pot. It must be made for use with an induction cooktop. IKEA has great deals! Anyhow, email me and I will send photos.