Jeff,

I hate spinning deer hair so I let my wife do it. A couple things I've noticed when she's working.

There's no such thing as overcleaning deer hair. She makes sure all the underfur is out of her bundle before she spins or stacks it.

Once the bundle is spun, she packs it tight against the preceding bundle, gives her very dense looking bugs.

She uses curved scissors with micro serrations to rough trim the hair then tidies up with a double edge razor blade that she breaks in half. The double edge is thinner so it bends easily to fit the curves of the fly and it's sharper than a single edge blade. Cover the broken side of the blade and the ends with a couple strips of duct tape.

REE