Yes I have. It can be a bit difficult to deal with due to the curve. Most of the RV guys at my airport do it, but still do have the problem of the bend. I think that they use a pin that is of a diameter smaller than called for with the hinge that they are using. Certainly, I used hinge pins all the way around and on the more straight areas, I really like them. If I do it again, I will try to do it more like the RV guys do.
See N64KR at <http://krbuilder.org/> http://KRBuilder.org - Then click on the pics Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best KR at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Interior at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Paint at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Interior and Panel at 2008 - KR Gathering in Mt. Vernon, Il - MVN Daniel R. Heath - Lexington, SC -----Original Message----- has anyone used a piano hinge around the firewall to attach the cowl to? I have a friend with a glass air done this way works good, any thoughts?