Ahh! You bought the 90mm ASPH/APO? I bought it two years ago by trading in my existing 90mm M lens and it is astonishing! Many times I go about town pointing it here and there with b&w film in my M6 TTL and am always in awe about the footprint it establishes on that emulsion. It is clearly one of the greatest 90mm lenses in the world!
Tom I disagree
I regularly print from my CZ lenses in 35mm to 16x20. They are sharp and slightly grainy but very presentable and saleable. These are Tri-X in Microdol. I spent time studying from a Magnum printer who also prints up to 16x20 and that doesn't present a problem for well executed 35mm negatives. I guess it depends on tastes. Soft these prints are not.