I don't think this lens has been mentioned here on NG, and I know the earlier version was not very good (I can attest to that), but seeing a later Ai version for sale I thought I would give it a try. These late 70's and early 80's Nikkors really were superbly built and take hard use well. Modern lenses do suffer with use but everything in the older lenses runs on grease and tight tolerances. Due to the passing of time we are able to have these older lenses as a choice - a nice choice too.
I found the 43-86 easy to focus and use, there is no zoom creep or undue bad behaviour. As to image quality, it does like to be stopped down then it is up there with other lenses, wide open it is a bit hazy (some may like that though). I used a hood to prevent flare. My father has one too and he very much enjoys his example too. I was wondering if a modern AF equivalent may be possible and popular today. Maybe start from 40mm but keep the 86mm and constant f3.5 aperture? I do know the Series E 36-72 replaced this lens in the line-up. I used a D750 for this set and this is near Drayton Beuchamp.