Broke my uv filter on my redrock m2....

you are better off without it. it's really only there to keep dust out. the problem though is if you shoot into a light source like a window or an actual light, it will produce ghost images. just be careful about taking it apart in a dusty environment.

you should get the hard mount kit. then you can keep your achromat attached to the adaptor at all times. that will keep the dust out and give you better alignment than the rubber hood.
 
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