I'd have to disagree with Paul on using a barlowed 25mm instead of the 12.5mm. It won't be nowhere near as good, even through a good quality barlow. I know because I tried; uncomfortably sensitive to eye positioning, poorer contrast with noticable stray light and internal reflections.
As for the 30mm: compare the field of view of with that of the 2" 26mm. If the 30mm does not give you a wider field, then there is not much point keeping it.
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Originally Posted by davidpretorius
You have picked the worst time of the month for viewing anything apart from the moon...
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The Moon will get out of the way before you know it and it is a great time of the year for deep sky. Galactic centre is approx straight up as soon as it starts getting dark.