I was wondering, how hard is de la riva guard on your knees? I was talking to someone the other day and they mentioned that it can be pretty stressful with the way the leg is threaded through, which would seem to make sense, but I don't know anyone who has actually gotten a knee injury from DLR. I've seen plenty of people get injured from rubber guard, and even one from butterfly guard, but never DLR. Can anyone comment? If it is stressful, is there anything that makes the guard safer on the knees?