It's all ball bearings...
I passed a black Ab-Flug MKIV going north on Route 28 this morning in Manassas Park at about 8:30 AM. Couldn't tell if it had VA plates or not (or any plates at all for that matter). Never seen one in person before and since I only see about one MKIV a month, what are the chances this month's would be an Ab-Flug? Still not a fan of the kit, but it definitely looks unique on the road. I was in the black MKIV on 28 south that tried to give you the high sign BTW.