The surface is all rounded off...it'll just bounce out....needs to be flat and square....if that's how it got supplied....
That a boy
Hhhmmmmm...an alloy bodied one not a hardened steel one tho I'm afraid!@Mickeyspinn
Could a man with a lathe (eyes you intensely) take down a headset cup size so it'd fit? Rather than me having to do anything to ze frame.