General spot spraying and areas unto 10 meter square we use IK9 sprayers - robust and chemical resistant - spares always available bigger areas we use x-jet type attachment on the pressure washer - use this for large areas and roofs..Electric one would be ok like a backpack but will need to be well flushed out after every use Darran
Carl - take the machine over to Julian @ Britclean, Biddulph.He knows the machine because he got mine in and serviced it.Alternatively - give me the machine, I'll get it fixed and be very happy!!