James
I would be a little concerned that the higher power ones may be pushing the power a bit. The 6.8mm would give 186x and the 8.8mm gives 142x. When I had my 12" I found that pushing the power beyond the 115x that I could get with a 13mm EP was only rarely possible and even a 10mm ethos giving 150x was viable only on those rare good nights.
Power is not always your friend as it magnifies any atmospheric disturbance.
Just a thought!
Malcolm
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