Toyota Aristo Jzs147 Ashtray gauge holder

I used to have an Apexi SAFC II in my ashtray, as pictured, but i've gone for a more capable engine management unit, and i removed my SAFC II from its enclosure, i have a spare stock ashtray assy, but i really liked having a stealth gauge in there.

So i decided to put my o2 sensor gauge in there, its not quite like i imagined, the pic in red was how i wanted, but it wouldnt clear the housing, so I printed a small semi-circle to get the same look going, its not fitted, but has been mocked up.