Ah right makes sense, I should have looked into that.

I was going ask about the damaging your own motor I assume electric axes must need plenty of spares lol. Looks like I'll be going down the gas route then, I was considering going electric for a couple reasons the main really being its surely much less hassle than gas and im planning to have a almost 2kg hammer head which would of been decent with an electric motor throwing it over 180 degrees as I figure the heavier head with a motor throwing it the better.

I was going to make my own thread but im sure all of my questions have been asked before so I've done a far bit of searching and reading up.

Thanks for your help