That is one fine scope.
I found that covering a truss model will make the views much better. I am in a dark spot and used a 235mm with truss ota regularly (it is out of service now) and found once noticing the improved contrast when covered used it covered from then on. I think the "saffety" aspect is a good one also and if nothing else must restrict dust getting to the mirror.
I hope these clouds go so you get a decent go its nice and dark
alex
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