I would strongly recomend AGAINST using Aerostart in a heli engine. It is a product that contains a large amount of ether (which is good for putting the nighbours dog to sleep when it wont stop barking) and it is gererally used to get tired diesel engines started. For some reason the prolonged use of the product seems to cause the engines to develop a dependence for it and often wont start without it, the last thing you want in a $35000 donk.
This advice has not come about from personal experience, but from what I have been told by other people. So it could be totaly incorrect
Regards