I don't follow you, I didn't report not having good results, I did state that roll film was available in 36 exposure rolls (20/24/36 etc) and that usually I could not review my results until home and having sent my film through a pro lab.
I did not have nor do I believe in generic "settings" and at that times I used the sunny 16 rule or my Sekonic Marine Meter for exposure info.
I had, as well, an Ikelite housed Nikon FM and never had problems with O rings on either it or my two Nikonos IIIs.
I used Ecktachrome 64/160 which latter became Ecktachrome 100/200/400 etc and often I used Kodachrome 64 or I used Tri-X B&W and developed it my self on my own Bessler Enlarger which I still have--anyone want it?
Do you have to use slide film--no--but I always had poor results with prints and especially hated those matte finish photos so common during the disco era. Print film, color negative film, the film processing has the extra step of printing to paper, the color positive process, slide film, you got what you shot!
N