I have found that the turbin points from crimson talon effect arrow flight, so if your trying to tune I would use regular field tips. You really need to step back to 20 or 30 yards perferably 30 and start shooting. Make sure you will hit the target, thats where shooting at 5 or 7 yards comes in. Once you are on target get back to 30 and shoot a group. Pay attention to arrow flight, if its kicking right or left you adjust your rest in the opposite direction in very small incriments. As long as your arrow is square to your string like you said and the top of your shaft is about even with the top of the holes in your riser that should be good. Once you get your rest adjusted to get perfect arrow flight then you can worry about you sights. After you get all that done then its time to screw on a broadhead and shoot at 30 yards or so. If the flight is perfect and it hits the same place as your field tips your ready to go, if not you need to tweek your rest a bit still. What you do is shoot a group with your field tips and then a group with your broadheads. If they arent all together then you adjust your rest to bring your broadhead group towards your field tips. Using small adjustments the groups should come together until you get good groups with both and perfect arrow flight.