Steering reversed w/an Arnison could be a bit more than just comedic at the dock!
Nice coolers and good instrumentation are so important.
I've gone back and forth about an oil thermostat a jillion times.
My temp sensor is in the pan and i found it took awhile to warm up all the oil in the pan.
I was really concerned until I shot the oil filter shell w/my IR temp gun and decided all
was good and temps were great. Here in Florida, the water temp is in the high 80's
most of the year and present the boat owner w/ a bit of a dilemma as to necessity.
I did go to the trouble to pick an oil thermostat, decide where to mount it, and how to plumb
it w/the least disruption to existing hoses, etc.
Your drive installation looks spectacular and I hope you have none of the handling issues
so common on stepless deep-V hulls.