Remember that a 1:700 BB will probably give about 5 or 6 ounces to play with, it will also have a much larger proportion of its volume below the waterline as opposed to a 2000 ton CG cutter at 1:300 with its 3 ounces and more plastic upstairs. Still a challenge to get everything in and accessible, but it can be done. At such a small size, they do need very calm conditions, what is a light breeze to you is a storm of biblical proportions to a 1:700 sailor. Or even a 1:302 one.