Bought my GMC-320 plus 2 years ago. Just getting to use it now. There is no serial number on the unit, but there is a label on the box: "B----GQ---." Doesn't seem to work. Any other avenues to register? Thanks.
That explains a lot. Sad that there was no mention of that when I spent over a $100 for the unit, which I may not have purchased in that case. Thank you, EmfDev.