RE: what type of cam do i have
They hyper max cams are high energy cams. If you have the single cam model you still list it as high energy cam if there is not an option for a single cam.
Round wheels/ eccentrics are exactly that, round wheels.
Not real sure what a modified cam is. I would be asuming a cam & 1/2 type of system??????
Your string is fast flight. Dacron is hardly used any more. Some of the traditional bows still use dacron and if your compound bow is very old it may have a dacron string.