You might want to look up other 150mm triplets and their reviews to help with this. I don't think there are too many of these floating about in Australia. At least mentioned here anyway. Also, they would be used for AP more so then visual as the several thousand dollar price tag for one of these would score you a nice C11 Edge or C14 which would out perform it in almost every way for visual use.
That being said I would definitely have one for visual use. Because magic triplet APO optics. It weighs a lot though 14.5Kg just for the ota? Rings, diagonal, eyepieces, finder, would pushing about 18 kilo's. Then again if you $7000 to spend on an OTA you can probably afford to mount it too.
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