I noticed that 60 people had viewed this post and no-one had replied. Probably for the same reason that confused me. Why would you want to make a climb cut?
Are you concerned with tear-out along the edge or at the corner?
If it's at the corner then do the cross-grain cut first then the tear-out will disappear when you do the other cuts.
If it's along the edge because of narly grain then I would do it with a table router and really sneak up on the cut, just doing a few mills at a time.
Of course if you are going to use a table router you are going to have to make a new fence with a semicircular cutout. It won't take long, you can use the template you have already made as a guide.
What do you think?