I thought that I would try Prescysol EF. Because I dont want to reinvent the wheel, I would like to ask some questions to this sage* group of erudite* darkroom practitioners of the ancient art of photographic alchemy. 1. The times for agitation are presented fairly well in the Photographers Formulary text. My question is whether its best to develop a roll in a double reel tank with the upper reel empty and enough solution to cover the loaded reel only? Ive used this empty-reel technique with other developers and it seems to promote very even development. The amount of air space could cause more oxidation of the solution and Im concerned about the effect on Prescysol EF solution. Any tips for an agitation plan? 2. The suggested starting time is 10.5 minutes for stand development. I imagine that there will be some final correction for my individual system. Have others found this to be a good ballpark estimate? 3. Is the Photographers Formulary text about full emulsion speed correct? 4. The recommended dilution is 1:1:100. Have others tried different dilutions? Are there any advantages to adjusting to something like 1:1:50, 1:2:100, or 2:1:100? 5. Does anyone use Prescysol EF for pushing? Digitaltruth Photo shows a 2 stop push with a standard developer is x2.25 the normal time and a compensating developer is x1.85 times normal time. Would Prescysol EF be classified as a compensating developer? If the suggested normal time is correct then this would be 19.5 minutes or 23.5 minutes (rounded to nearest .5 minutes). I have not seen very much on this aspect of Prescysol EF use. Thank you for your generous* time and gracious* responses to my lowly and unworthy inquiries. *Anything that helps me get needed information is OK by me.