I still have an old Mk3 jacket, just the job, it would be great in a few different colours! I have two leather jackets and the only comment I have, and this goes for most flying suits aswell, is that the manufacturers always insist on stiching the arm pen pocket right into your elbow joint! It needs moving up a bit and slightly back to stop it from being annoying.
One leather jacket I have has elasticuffs which are so bloody tight I gave up wearing it, shame 'cos it cost a fortune.
Heavy zipped pockets can be annoying when it's really cold because you end up taking half your skin off when you put your hand in
Rick