Thanks for the speedy words guys... looks like i am going the OS lol... can't beat 'guaranteed' reliability.
I'm going to throw a question out in the open here, is there anyone in the states that is will to help me with purchasing an engine from over there and shipping it here for me?? Due to the Aussie dollar at the moment being fairly strong, the US prices beat out RRP by a big margin, and have tried to buy through an online store, but there is only 2-3 major ones i can find, and was hoping maybe someone had a personal connection with a hobby store that could get a price for a desperate aussie after an OS powerplant

I say this because the Australian suppliers are out o f the 61 and 91fx, and whatever is here as old stock is going for the same price per ounce as gold! Let me know