Why don't you recommend a developer, johnielvis?
I use Dektol because it was suggested as strong on forums and blogs and was easily available.
If there is something better to buy I would love to try it.
I prefer XTOL replenished to develop film for better tonality and finer grain, but I have not tried it with B&W reversal. I would suspect that XTOL will provide finer grain than Dektol for slides. Dektol is a paper developer.
good starting point is here
I use around 5g/L of KSCN, but that means nothing : you have to find out your own amount to add to make it work. Don't add too much otherwise you will lose density. Experiment.
Is it possible to judge from a first development only what the appropriate time and amount of hypo is for a particular film?
It would shorten the experimental cycle somewhat if one could simply run short lengths of film through a first developer, using differing amounts of hypo, then inspect to see which combination has the best potential.
What would one be looking for in a negative after first development that would indicate that it would make a good quality reversal?
Or is this akin to suggesting one would have to be looking for something that isn't there yet ?
did another try this time with the same films. again panf+ really dark. but the extreme 100 came out perfect. very fine grain and a nice looking slide. for $30 a 100 foot roll i might call it a day and stay with what has worked for a while. then tackle panf at a later time