Thanks guys,
I have tried with and without the 1.6x barlow, so i'll try with only a 2x barlow. For planetary viewing this would be fine.
I have a mirror diagonal only, but i guess i can try without that as well. Thanks for the tip that a prism diagonal has a shorter light path.
I think i'll just get a bigger scope before i go around cutting the OTA.
Hopefully I get clear skies tonight. Last night jupiter was fantastic.
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