I WISH i had a mill!
No, this was done with many hours (4) of dremel and hand sanding. The bottom of the chassis is sanded away a full mm to allow for a lower car. The center is removed for more torsional flex. There is also a removable radio tray... which i did not have time to flush mount for the Birds. The cars transfers are VERY smooth. With the weight being as balanced as it is, and moved more forward, the car is consistent and has more initial turn-in than a standard TC3. As far as breakage goes... it was hacked relentlessly at the Birds...and survived dent or crack free. I just needed more time with the car to tune it in. i have more pics too in differing stages of completion...