pay the extra lee and get one from wcw , at least you are covered if anything gos wrong .Johns a good bloke at extend to wash but the products aint up to much .
What's the flow rate like on the single speed backpacks, to they kick out enough for fan jets?
its a small dial you just turn it up or down accordingly to your flow. and it has a on and off swtch. i just keep the controller numpty as it is and switch the power on and off.