Unfortunately, any issues that end up in dispute between Bavaria or their UK distributor Clipper Marine in regard to keels usually end up with the solicitors insisting on a confidentiality agreement being signed to settle, so you will never know……………..
However, you may want to contact: firstname.lastname@example.org He has first hand experience. He is RYA approved. Do a no win no fee deal with him and limit the expenditure to known deliverables. If you have the time do a good google search on the subject matter there is info out there.