Realy? Form my understanding MCM100
is a type of extreme finest grain developer.
As I would expect its characteristics I would compare it as "hyper Perceptol"
and this should be in also concern with
less contrast.
Lost of speed is the same as with Perceptol or lets better say : a litte speed is remaining

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But I might be wrong

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Yes in addition it is hard to get ppd.
In a some years more we could see the same with methol.
There might be some people who are always trying to drink this stuff - therefore
officials want to protect us from danger
and very "evil " developer compounds but same officials allowed companies to use same compound to wash your hair with (ppd)






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with regards