>>2918252I dev'd it with with a compensating developer (diafine) to tame the high contrast nature of the film but it still came much too high (pic related). Some people online have tried similar methods but the bottom line is for optimal results, stick with adotech. Here are some links:
http://www.theonlinedarkroom.com/search?q=cms+20Btw, that blog also contains a lot of good info when it comes to developing and printing black and white film in general.
Considering CMS 20 is really just a rebranded micro-film, you could also experiment with low contrast developers designed specifically to yield normal contrast with microfilms. Here are two manufactured by photgrapher's formulary:
http://stores.photoformulary.com/phenidone-extended-range-pota/http://stores.photoformulary.com/td-3-techpan-developer/Honestly though, chances are you don't need the grain to be that fine and films like rollei 80s have similarly fine grain without being quite as finicky. even more conventional films like Acros and Tmx are fine for most fine grain purposes. As always with film, you'll get optimal results by experimenting with exposure and development to get easily reproducible results that match your desired output.