I just received and installed an ISIS 2 XL and, much to my surprise, it uses a uV cut for M2 and derives M0 and M1 from an optional second pass where it presumably injects uV. That was what I had wrongly thought the I1Pro2 did.
First cut on some generic Costco glossy. Ave dE was .09. Ave on the I1Pro2 is about .15.