Yes, I think cats are moderately easier to control than this wire
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My wire is a bit thinner than that, as I said about 3.5 thou. I don't think it's that critical. And for various reasons (not to be put here to avoid the Moderators...) I have reservations about the spools I've seen on Ebay.
I think perhaps I should get on with another project while I think about the wire. Keep on fiddling with the tangled spool too, I may get an end to come free. I will of course read and respond to this thread. I am certainly not giving up on this machine!