I recently posted here on WP about a problem I was having with my relatively new INON 45 degree viewfinder ( http://wetpixel.com/forums/index.php?showtopic=37807 ). The issue has now be resolved by Kevin Reed at KMR / Aquaphot ( http://www.aquaphot.com/ ) but I do have to accept that perhaps the design of the viewfinder may be flawed and encourages corrosion and consequential jamming of the rotational mechanism. The problem seems to only be waiting to happen again...
During this rectification process I became aware of aftermarket adaptors, manufactured and supplied by Reef, which apparently address this issue. At $200 plus trans-atlantic shipping to and from Reef for fitting I'd be most appreciative of hearing from fellow WP's of their opinion and experience of Reef's adaptor before committing to this expense.
Many thanks, Tim