that does seem handy. there was a similar post a few weeks ago aswell.
personally I would love to find one of these tools. I inquired to Park about them but it is no longer made. Park did tell me that since all new cranks are 4 bolt (yes 4 bolts on the chainwheels) you didn't need one. a quick look arouind a bike shop the other day I saw only 5 bolt cranks. they must be C&V bikes then LOL
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk