Diddl - Nice collection! I have about four 1571 drives (3+my 128DCR) and two 1581's (and a 1541-II in my closet somewhere). I have jiffydos in all of my dirves + a couple of ramboards. I have never heard of prologic dos. I'll look into it.
You're certainly correct - maverick is very special to 1541/1571 drives. Maverick does not work with cmd products (well, as far as copying to emulation partitions on a ramlink or hd). I wanted to have maverick on my ramlink/cmd only to boot the software. This is just a matter of circumventing whatever disk boot protection KJPB used. What you said is true, Diddl. The DOS rom is not the same and when maverick makes it's disk access routine calls, the software hangs (fails).
Many years ago (about 20) when I was a teenager I was extremely involved with the c64/128. I ran a BBS, was active in my local users group, did a ton of 8 bit assembly coding, helped repair C= equipment, etc. Then I graduated from high school, went off to college, and gave up my time consuming hobby. Even sold off my equipment. 14 years of college, 4 degrees, and 1 tenure track university position later I decided that it was time for me to return to my passion for C=. You can imagine how excited I was to find all of the people here (people like you, Diddl) who helped keep the faith over the many years.