I've been having huge amounts of trouble with my two foot spin, especially the timing of the pull-in. I was practising on my spinner at home and happened to use it while using hand weights. They were very light -- only 500g (about 1.1lb), but seemed to give me more of a sense of control and of where my hands are.
I've seen kids do spins and even jumps holding their guards, but that seems to be more for body awareness. Is there any advantage to practising spinning while holding weights? I'm worried that as it accelerates the pull-in (by bringing more mass toward the centre) it might give me a false sense of balance and speed that I wouldn't be able to replicate without weights.