Just picked up two packets of munuch classic. I've never been able to get the esters I'm after with 3638 or 3068, they were always a disappountment. I'm planning to brew a batch of hefeweizen this Saturday to try this yeast out. After reading that comparison sheet linked above, I'm curious about trying an open ferment. What's to keep mold spores, etc. from landing in the fermenting beer? Or am I missing something?
The open ferment really does make a difference in getting more "expression" out of the yeast.
Unless you have a very clean location with filtered air you could try what I do:
Pitch the yeast and once the krausen is covering the wort, replace the lid of the fermenter with a large plastic bag that is just sealed enough to keep bugs out. Flush the bag out and pull in fresh air occasionally.
After a few days, when the krausen is almost gone then put the lid on till it's ready to package so C02 can build up to protect the beer.
You also want the widest fermenter possible. Food grade plastic bins or a large square fermenter that is only half full.
Ideally you could have the entire fermenter in a sealed bag with a small air filter to maintain fresh bug/dust free air.
Filtered air arriving at the bottom and an exhaust at the top.
I'm keen to try that munich classic as I've never beer that happy with 3068/3638 either.
I'm currently been using my own culture from a bottle of Vitus, but it's starting to change after 12 generations of top cropping
and it's not often I can buy Vitus.