I may be wrong but it seems that the JB-5 series of kits have changed the Headstock's from 5 inline to 4+1. If so this is a good thing and I noticed at least one other Forum Member comment along similar lines recently. However, the pics on the website still shows them as 5 a side. This could be a deal breaker for some, it certainly was a turn off for me.
I might be a good idea to update the pictures or at the very least make a note of the Upgrade. After all people want to see what they are getting, and get what they see.....