Thanks Bruce, much appreciated.
Also, is it possible to replace the piston in this model (Vantage I believe) after all the work I've done on it I still can't get it to fire (spark is good, fuel is getting through to plug) but it feels low on compression, + looking at the piston (through the exhaust port) it appears terribly scored, upon speaking to my ex, she informs me when it stopped working there was smoke coming out the top of the casing (directly above the barrel) so my synopsis is she's not got the fuel mix right & cooked it??
It appears as though the barrel is part of the engine assembly hence making access to the piston impossible.
Should I persevere or call it quits on this machine???