I agree with Tx Jim a Hi-Cap is the only way to go and I've ran all types of wheel rakes. As for the center kickers their not really necessary, I've had my rake 6 years and have put them on the ground twice. With that being said I mow high though 3.5 inches is a low cut for me. At that height even tedded, the stubble will hold it off the ground and set the pickup teeth at 2.5 inches, and leave very, very little behind, nothing is 100% efficient. If you have a 8' mower get a 10 wheel, 9' 10, 10' 12 if you don't ted. I have a 10' with a 10 wheel and it ain't big enough. Buy what you want just size it right. One last point, unless you want to replace teeth all the time don't do very short turns with the wheels on the ground. I've seen people do 180's with the wheels on the ground and that is a totally unnecessary expense.