Sure its a replaceable bearing, they didn't pour hot aluminum around it,
the bearing is pressed in, you just have to make an arbor press ,
and a few jigs to press it out again ..
A straight forward shop practice.
Or, just buy this part :
http://www.sjscycles.co.uk/brompton-...rga-prod13734/
the allen key fixing brought out in steel in the same way they did
in the Ti Version is a good thing..

Ground down the edge of a 24mm socket, so I'm OK with my old gear.

wont need to fit Spud Pedals in the field.