I now have my long stroke large bore air cylinder (many thanks Jonathan Barnes) and have my Heath Robinson system (sort of) working, but need larger bore spool valves to get the air in and out of the cylinder much faster.
... so has anyone got a three way spool valve with maybe 1/2" BSP or even
3/4" BSP ports kicking around? Preferably solenoid operated but beggars can't be choosers can they!
Andrew Mawson