each to stacks.
it is important to attach the wires very firmly and in time, before the branches are too long and stretched out of the two parallel wires.
if you have any more questions, i will be happy to answer them. fast last night and got quite lost!
thanks for writing in, chris. step by step is probably good advice. though t is normal to be a bit confused right before understanding kicks in, so maybe you did better than you thought. happy you are enjoying it! 