I am currently using a size 14 needle to sew my garments and a question about deflection has come up as my sleeve seams are not coming out straight and puckered.
Have you worked this out yet? What I find odd is that it didn't happen on the other seams – if it were the needle flexing, presumably it would? I guess there's a lot of fullness there, which would suggest a slipping issue over a flexing issue.
Do you know what I would do? Id ignore it.That may sound sloppy or defeatist - but I have done WAY more damage in the past trying to rectify tiny details that on I would ever notice [or a well skilled tailor]. The fabric frays out at the edge, or you accidentally put a hole in the cloth, or you do it and its worse the next time. I accept my little mistakes and try to learn from them for the next time - take a bit more time, make my basting and matching a bit better.
Have you worked this out yet? What I find odd is that it didn't happen on the other seams – if it were the needle flexing, presumably it would? I guess there's a lot of fullness there, which would suggest a slipping issue over a flexing issue.