I really liked the smell of Columbus and the wort so I think this one will turn out well! The boil was fairly vigorous but it would be interesting to hear from some of the experts if this 90 min boil for the Pilsner malt is no longer needed? At least this is the first I hear of it..
Regarding the all-wheat beer, it has been done and there are no problems with it. The guys from Basic Brewing did an episode about it:
Once I brew the all-wheat beer I will post the results here since this seems to be something that is not that common for some reason.