The rear is not adjustable it has been covered a few times all ready on hear if you have a look, the ends of the rear axle are welded into place so carnt be adjusted.
Is it a stock seat or after market? I repaired a seat for Mark on hear as his would not lock into position. So we just drilled through the bit where it pivots and put a nut and bolt through it worked a treat!
Its all ways up a side street when I see it not far from Tingley bar fish and chip shop I have only seen it from the main road so I carnt say much about it other than its silver lol
They are mate they make life so easy!! the old tyre machine he had before this one was an animal lol the clamping jaws closed like Arkwrights till draw lol It made ya jump every time snapped shut!