Almost the same as Nik - I have the SW 0.85 reducer/flattener and it works a treat with "large" sensor cameras such as DSLRs to stamp out the distorted stars.
At the moment, most of my targets are small enough to fit into the reducerless FoV. Big targets like the Rosette and Eta Carina Nebula do need the reducer.
Can't speak for the Orion item, though.
Cheers,
V
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