I have a question about bits. I've been riding my 12 year old gelding in a loose ring O snaffle bit, which he does great in. It's never pinched his mouth and he's always been fairly responsive. Lately we've been getting back into english and starting very basics of eventing (we've been riding Western for a long time), and I've been noticing a ton of Dee ring snaffles out there...is this something that I should consider changing him to? I don't want to unnecessarily ruin his mouth, as he has a very soft mouth (pretty sure I could ride him in a shoelace).