Here's how I weigh mine. Very small ones I will put into a coffee can, and weigh them on a digital postal scale. Medium to large ones I put in an empty feed sack and use a hanging type fish weight scale. Very large birds I will just hold and step on the bathroom scale.
Woods and feathers- On brooding-Most of mine will lay a decent amount of eggs before going broody, this actually is a nice thing about them. Typically mine will start to think about brooding between late April and early June here, when the days get long and weather gets warm. They will then have laid for me from Late Jan-Mid Feb until they brood, so, maybe 3-4 months of laying, then, they can set for me when it starts to get very hot. When it gets hot they would quit laying anyway, so they may as well just be broody then. For really early broodies, I have mixed bantams and other orientals that will brood earlier, I actually already have 4 chicks out and another hen setting, but none are Cubas.
MNSheperdess, where did you get your whites? What do think about them? Can we see more pictures? The avatar picture looks good, would like to see more.