So, building my -9's tail, I messed up one of the HS spars, bad enough that I just ordered a new one. I've run into a question when it comes to match-drilling the new spar with the existing skins that were already match-drilled to the old spar. I'm thinking that thicker spar metal is going to guide the drill, and if there's any misalignment it'll oval-out the skin hole, rather than the desired action of milling the spar hole to match the skin.
OTOH, I've been most impressed with the accuracy of the pre-punch holes, and I feel there's a very good chance the holes are adequately aligned as-is. So I'm thinking to final-drill(*) the spar without clecoing the skin on, trusting that things will just work out.
Yea or nay?
[* Or ream rather than drill, I think reaming has less tendency to move the hole center.]
OTOH, I've been most impressed with the accuracy of the pre-punch holes, and I feel there's a very good chance the holes are adequately aligned as-is. So I'm thinking to final-drill(*) the spar without clecoing the skin on, trusting that things will just work out.
Yea or nay?
[* Or ream rather than drill, I think reaming has less tendency to move the hole center.]