I stopped building engines and that project always sat in my brain and "swirled" around but never got back to the design stage for a flowbench mounted setup . . .
3d printing came to PTS last year and that has been a game changer for alot of designing of projects for all sorts of things, following Varnish's lead on his tumble meter sparked that "swirl" process in my brain again! I figured once I had a better handle on my 3d CAD/print skills* I would undertake the design again. I spent the last 2 weeks in my off hours trying to get a working design that would be simple to implement using an inexpensive DC motor, 3d print and a multimeter for the display. It will also hook up to the current 1100 Series PTS DM. (I've not looked for a different display right now but will in the very near future, Arduino or simple DC voltmeter)
It shows CW for + DCV and CCW for - DCV, the attached picture was the working prototype setup on my bench. I've refined the design a bit more since this picture was taken and will update this post in the future . . .
* by far still do not understand the 3d CAD/Print part but I am learning
