This flattener came with a scope I purchased recently. I have managed to pick up a 4 inch flattener, so this is now surplus to requirements.
Link to more information
I have seen a few threads mentioning these flatteners being used with GSO RC8/10 and WO FLT-132. I have no personal experience of use with such scopes, so can't guarantee results - just putting it out there that it may have a wider application than just Takahashi scopes.
Retail is $550+, so I'll price this one at $350 plus postage.
DT