A friend of mine sent me a website with photos of SD90/43 with wings. It is apparently the only Sd90 to have had the wings added. Here is the site UP8242
Nice shots- especially the "flared flag" SD70s! Can't say the same for that "patch job" tunnel motor (well, the quality was excellent, but the subject- blecchh!!) (I like my unpatched Rio Grandes, so don't be offended) BTW, does your friend have any more shots on the web? If so, please have him share with us- they're great!