I have an infinity cam, it does not have timing marks. The timing for this cam is described as being checked between the limb and module screw. The timing gaps are listed in thousandths of an inch and said to be within +/- .010. However it never says whether this is the botom of the screw, middle of the screw or top of the screw. I ask the dealer and they said it really doesn't matter they are not that sensitive. They looked at it and said it was fine. Then they drew the line on the cam for me.

And from what I understand mathews works the same way, you go by one of the holes in the cam or something. This is not the same thing as a definable timing mark like some other bows have. It's pretty easy to just draw a line on your came with marker though. It makes it very easy to see if any thing has changed at a quick glance.

Maybe the newer infinities and other cams have some sort of marks on them, but mine is a 2004 and it doesn't.

I honestly don't believe it makes as big a difference as people are led to believe. Heck I threw my darton out of time and it actually got faster.

I love my bowtech, but we had a local dealer get them and he couldn't quite get the hang of adjusting the posts and cams properly and he said bowtech wasn't much of a help to him. I think he pretty much dropped the line and stuck with AR's. Of course maybe he just isn't that mechanically inclined because I didn't think it was that complicated really. It just doesn't work the way you think it should is all.

I can't really comment on Parkers customer service, I have never dealt with them. However I have shot quite a few of thier bows and thought they were pretty nice in comparison to others on the market. The only bow company I have ever had to deal with is Darton and they were top notch over the top helpful. From what I understand bowtech is pretty much the same way.

Paul