A scope helps with magnification and with using a single aim point to the target. With a good cheek weld, some people can shoot just as well with or without a scope. Too many people forget that they have to pay just as much attention to the rear as to the front sight. I haven't knelt in a match in a long time. A sitting position is far superior.
We aren't using cuff slings but I don't use one for service rifle and I shoot better with my service than I do with the match rifle. Learn to use the sling. It's the most important accessory to the rifle. I would rather go into a match with old ball ammo and my sling than match ammo and no sling. There's probably something wrong with the match rifle that I haven't figured out yet.
I hope that this encourages people to find a High Power match. There's nothing like getting a government rifle through the mail from the CMP. A friend's mailman asked what was in the box and my friend said that it was a semi-automatic rifle. The mailman yelled at him that he couldn't send something like that through the mail and he couldn't do that. My friend smiled and said, " I didn't. You did". Today, they use FedEx.