You are right. These are the units with low serial numbers, and they say the cost to upgrade would be "major".
I wouldn't part with mine either, and my upgrade is fine for me. But then I didn't opt for the deluxe package, because I wouldn't use it. At least I don't feel bad now about the low price. http://www.freehandsystems.com/phpBB2/viewtopic.php?t=417
pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact