Disc Rotor Travel Protector

I made these to protect my rotors when I pack my bike for travel. There are spacers for both 12mm and 15mm axles. The black cover piece can accommodate up to a 203mm rotor. [Why not a round 200mm shimano? I digress]. Pair these parts with some ¼" -20 [or M6?] threaded rod cut to length and some ¼" knobs. I used red Loctite on the knob on one end to fix it in place. Let me know how they work for you!