All this stuff is trivial compared to the real source of stress with contact printing. IMHO, cleanliness (e.g. DUST) is the biggest hurdle to getting a good contact print. I'd keep a neg brush and compressed air always within reach, and use cotton gloves. Always have some good glass cleaning supplies nearby too. Use an air filter, ionizer, hang a plastic trash bag, print in the nude, whatever you have to do to keep dust at a minimum.
And then learn how to spot your prints. You will eventually be pownd by dust no matter how elaborate your precautions.