Hi Burnsy,
these gears are done by a bloke in SA, they were sold a while ago by this fella and I bought a spare set to put on the shelf. A friend in the Berrima car club did his timing gears coming back from the Bay to Birdwood run. He has fitted the ones I had and reckons you can hardly hear them. I have not heard the motor yet.
The reason he fitted mine is the machine that is used to make them broke and took a while to fix. This is why they are now back on the market.
My friend rang me today to tell me he has got a replacement set for mine, so I will know soon if they are as good.
The bad thing though, and I dont know if its "GOSPEL" is that apparently he only has about 20 sets and is considering not making any more
I paid approx $100 12 months ago !!!
ChrisB