Re the comment about driving the ROP with 7 AA NiMHs and a spacer.
There is a way to avoid using a quad bore body.
The older type Willie Hunt brass tube and pc board holders where all cells face the same direction allows 7 Eneloops (only cell thin enough IIRC) and a spacer without any need for a bored body of any kind. Got a ROP H built this way in a red Mag body as I'm writing this...Made the spacer out of tape wrapped aluminum rod.
BTW, I find that I personally like 1111 setups better than a ROP H. Build them mostly in C bodies with 2 C lithiums. Like an 1185 LE but one cell shorter. But you need the socket conversion parts for those bulbs - brass drop ins work OK for the 1111. Bulb flash can be minimized by using a soft starter switch but the three intensity versions I have also require a tail switch due to idle current draw.