I have been VERY slowly working on installing an oil pressure gauge in my Aero. I installed the triple pillar pod with AFR, boost and oil pressure gauges last year. (I did say slowly) The Miller tool set has an Oil Pressure measuring adapter in it so I got it out and looked at how it installed and if my oil pressure sensor would fit and clear everything. It turned out that it fit very well and with good clearence.

I started turning down a piece of stainless steel to duplicate the Miller adapter, only as a solid piece. Then I thought, what if the belt breaks and gets caught on the adapter...SS threaded into AL....SS will likely win and pull out of the stainless. I'm seeing BIG $$$ with that picture. So I grabbed some Aluminum and turned it down, threaded one end to 12x1.5mm, tapped the other end for 1/8-27npt and cut a 22mm hex on that end for a socket/wrench. I have to run out and get a new 90* 1/8-27 npt fitting to finish the install and then hook it up.

Here is what it looks like in place. (you can see that the adapter didnt have the hex on the end when I did the fit test) I will let you know how the gauge works when I finish the hook up.