The only safety precaution is if using it outdoors in daylight never point the scope anywhere near the sun. I usually find the Cheshire easiest to use around sundown so no fiddling around with lights, just point the telescope at the sky.
One small safety point with any truss or open tube style scope is be aware that the primary can still focus the sun even when the scope as a whole is pointed away from it. . Probably not a major issue with the SW Flextube as the mirror is quite deep within the bottom tube, just be aware of it.
Cheers
Malcolm
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