I have a set of PA-12 lift struts that I intend to use on the Wag 2+2/PA14 that I am building. These struts appear to be in very nice condition. I have looked inside with a borescope and they loop pretty good. It's pretty hard to determine what inside is globs of old linseed and scale or corrosion. Scraping the inside with a welding rod and a rifle cleaning rod brings out the same kind of stuff inside new 4130 but I want to be sure before I use these. The best method of inspection would be an ultrasonic inspection. Does any one know who does that type of inspection in California? I'm on the Central coast south of San Luis Obispo. Any ideas? Any other ideas other than the regular punch test; or is that test ok? If these are good I'll use them otherwise it's $2K+ to replace.
Thanks,
Marty