Kit supplied supports are made of ABS plastic, while the hull itself is of Polystyrend, making gluing on the fender suppots difficult. This kit has a total of 18 support plates, 12 closed and 6 open, made of Polystyrene, so gluing is now not a problem. The open supports were often used on the front and middle, and with this kit you can mix and match supports as you please. The Tamiya kit only requires 10 of the supports. Also, some KV’s were not symetrical, in that there would be a mix of open and closed on each side, or just one side, but sometimes not the opposite side would have the identical plate.