I'm putting a Crank Bros. Cobalt C directset onto my 29er frame (2011 Soul Cycles Dillinger) to work around a fork with a short steerer tube. All indications are that the directset is compatible with regular style 1 1/8" head tubes, but when I lined it up, ready to press, I noticed that the bearing cups taper on the outside a little before the smaller flange (the part that gets inserted) begins.

This looks weird-- that taper will leave a little bit of the face of my head tube exposed. I guess this frame has a slightly oversize head tube? No pics of the installed directset I could find on the internet showed a situation like this...everyone's frame seems to have a smaller outer diameter head tube!

Anyhow, will this thing be reasonably safe once I press it?