If you call MSB up directly and discribe what the inside looks like they should be able to tell you what you have. Or maybe you could send MSB, or post here, a picture of your unit. There by getting feedback on your usnit. Sorry, I don't own the Full Nelson, but rather the Gold link III. Also I don't have a digital camera. I hope this helps or maybe someone else can help you out.
BTW, did you look at the manual. If you don't have one it is available on line. I seem to remember that it is very specific about the upgrades and shows several picures related to the upgrades.
BTW, did you look at the manual. If you don't have one it is available on line. I seem to remember that it is very specific about the upgrades and shows several picures related to the upgrades.