NRS Bighorn I Raft Frame at nrs.com
So it's looks like the bighorn frame and just the aspic frame of the BWO are about the same price... NRS frame is 650.00, also comes with strapes and straps to hold the cooler. The BWO comes in at 575, another 75 would get you oar mounts. I believe there a month wait time for them to build the BWOt. Both frames Can be retro fitted with ad ons. It seems with the 10.5 rafts you would need to put a stern seat or a side rail for the NRS anchor to work. Both look like solid frames just need to pull the trigger on one.
BWO "Built with top quality, lightweight, super durable 1 ˝” schedule 40 anodized aluminum pipe. Built in Salida, Colorado, USA, by boaters for boaters."
NRS "The NRS frame system is a marvel of simplicity and strength. The LoPro Fitting, cast in 356 aluminum alloy, is the heart of the system. Bolted into the ends of cross members and attached with a “coined” stainless steel U-bolt, it allows you to locate crossbars, seat bars, etc anywhere along the side rails.
The frame pipe is 1 5/8" outside diameter, 1 3/8" inside diameter. It is made of anodized 6061-T6 aircraft-grade aluminum for high-strength, long-wearing durability"