They did release illustrated service sheets for the Pixie. P1 Decarbonisation, adjustments and simple replacements. P2 Removing the engine/gearbox unit and complete dismantling. P3 Rebuilding and replacing the unit. P4 Front fork, steering and wheels. P5 Automotive unit replacement parts.
Herts branch used to have a fully sectioned Pixie engine, no idea what became of it.
1935 cammy Square, 1938 VB, brace of 1950 MkI Squares, 1959 MkII Square and several Ariel and Fleet pushbikes.