#3
The adapter for Dunlop pedals (which would also work with this one) is 200 mA.

So 300 mA should be fine.
Dear God, do you actually answer prayers?

Yes, but only in a way indistinguishable from random luck or the result of your own efforts.
#4
excellent, i can just a one for 10 bcusk at an electroncis store, rather than pay 25 at lakeshore music for a boss one