Now, now, gentlement, let's be fair in our exchange. If men could do it with muscets, surely, we can manage with keyboards.
The reason I'd personally prefer to keep the OOG diver in front is because in a backmounted scenario, it makes a difference - R/P rolloff is impossible, L/P rolloff is immediately detectable and manageable by the same body.
The reason I'd prefer it the same way in sidemount is it's possible to do the same thing regardless of system, ensuring consistency.
My preference, followed by reason why.