my headset press has got ‘stepped’ things
like in this picture,
but if I am understanding you right by “flat plates”, I need to use the stepped things the other way round to what they are in that pic?
i.e. so that the NON-stepped end presses against the headset cup?
or by “flat plates” do you mean the little washer type things that also come with the headset press (that i have never so far used – albeit only ever to install semi-integrated headset cups which don’t contain the bearings)
i’m sure it’ll be fine, i have installed a CK before using a botched together headset press – a length of threaded bar and some big washers from b&q, it was a bit shite as the cups started off wonky but straightened themselves out, but that was on a bike that i decided i didn’t like and sold fairly soon after, so no idea how it lasted…
but if i can make it easier for myself by understanding how you’ve done it all the better.