Wes,
Thanks for heads up on the Beech 18 spar problems. I read the AD and other stuff here:http://www.twinbeech.com/beech18sparconcerns.htm
I am not very concerned, since the Beech had landing gear stress (that I won't have). And I don't expect to be around another 60 years anyway.
Sorry about thread drift, but I think the original question was answered. ( I learn from thread drift)