Snip it off mate..
You 100% serious Gav 
Just cut it and chuck it and all will be fine 
Aye... Diode is there to prevent reverse EMF and voltage ramp ups on the EMF collapse... .. The turn off on a diode coil is much slower than one without.. if it states NO DOIDE then id go with the flow.. must be a STERN thing and possibly that the flipper shut down is too slow WITH diodes in place
