Hello! Here is my personal TARDIS, taken straight from DMU. Forged in the heart of a dying star etc etc, this TARDIS has a custom command block rotor, which is my pride and joy! Anyways, there is a world download at the bottom should you want to try it out for yourself.
I'm quite fond of the end crystal beam as a rotor however i would say possibly add some coloured glass to make it look abit better and lower the end crystal slightly. Also i would suggest adding more to the underneath of the rotor most possibly put the crystal there but add a form of particle affect with glass pains like a star trek transmat pad.