Anyone who has a chance to attend AJ's Ketron workshop... don't miss it! I attended the Jacksonville workshop and I can promise you'll learn a lot and have a good time. AJ is a gentleman and all around great guy who is willing and able to teach you much about his keyboards.
BTW, the SD5 is a great new keyboard. "Riff" is a very cool and usable feature which I'll try to explain in another post.
Glenn