Then you just get an extender for your EP. HINT: Unscrew the lens from your Barlow if you have one and instant extender.
I've done the shift the mirror bit, it's not too hard if you can get all the bits and just a matter of keeping the mirror stable and collimated. I used longer bolts and solid spacers so it wasn't wobbling round on long bolts and springs. I do have to use an extender for some EPs but my primary aim is photography anyway.
I've just bought a 2" 2x Barlow so that is also an 'extender' now when required.
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