Craz1, Digisync really is a great product.
I live in brazil, import costs are very high for us. A purchase of one hundred and fifty dollars costs us more than four hundred and sixty dollars .... Because of this it became "cheaper" to make my own synchronizer. If I had a six-cylinder CBX and I lived in the USA, I would definitely buy a Digisync.
I have an original 1973 CB500K2,
without the original 4x4 exhausts