I well remember the kodachrome transparencies and they were not always mounted by the processor. However the mounts were a poor substitute for the real thing and the glue would let go sooner or later and the film fall out. Kodak must've used a heat seal or somesuch.
I must say I never considered a roll film projector but it would be great just so long as you recorded everything in just the right order and didn't have any failures.
I was never that clever.
For a couple of years I used CN41 film and that satisfied the family snapper in me but am in the middle of a protracted stay in France and have 2x B&W to develop when I get home. I will scan them. If any are spectacular I would wet print but don't expect to get stained fingers any time soon. Scanning is so easy (Lazy).
Probably the greatest challenge is the capability of the film to record on a small format. Compared to minox it's gigantic. Kodachrome had no grain and was perfect for the role. Anyone tried Ektachrome lately? But basically we're limited to slow film. MInd you ISO 100 was pretty fast in those distant past days!
Any way - welcome to the group! Haven't seen any postings by anyone in a month or two. We need a nudge now and then.
Murray