This is one is for steel specialists: My taildragger KR2 main landing gear legs are made of spring steel. They hold to the gear brackets by 4 bolts each. The bolts are metric, 10mm diameter.
I would like to change that for the nearest AN size. That would be an AN7, which is 7/16", that is 11.11mm. So I would have to enlarge the holes. Now, I don't know much about steel, but I know by experience that it is very hard to drill through these legs, since 3 years ago, I tried to drill a couple of tiny holes to hold some brackets for the brakes lines, and I gave up. Questions, then: what are my chances to succeed, what kind of drill bits should I use, and what is the correct drilling technique? Serge Vidal KR2 "Kilimanjaro Cloud" Paris, France
