I got my pile of BoB parts from isotope yesterday and I was stoked to say the least. He even printed out a JAX name badge for me \o/ Thanks man! My BoB is glow-in-the-dark blue ABS and it luminesces as advertised. Blue Glowy BoB... mmm.
Initial test fits showed that there was going to be some grinding work in my future to make things work. One change I made to the original build list was using an HC-SR04 for the sensor. The sensor holes in the head were too close together so I removed some material on the outer edges to make it fit. It's real nice now.