If these units were still readily available and the crt logistical chain was still up and running I could see myself "playing" around with higher resolutions and refresh rates beyond spec, but since these units are the very last of their kind and will someday in the very near future be gone forever I would follow the advice of someone like Vito. He doesn't give out advice just because; he's a master of his trade and I'm sure he gave it for a reason. Most likely, running these units above specs places undue wear and tear on the electronics.I’m all ears. Curious to know if the circuit gets hotter at higher refreshes. If not then I’d say you have a point. If only a little I’d still say you have a point.