Please be careful when "torqueing away" any gap on your aircraft. Over torqueing can get you into a bad place.
Thinking through some possibilities:
- Consider measuring both your braces. Are they the same length?
- The gear brace is the same part on both sides. Does the gap go away when you swap them (if you already placed the fitting on the other brace, you'll of course have to remove it to test)?
- Is the aft gear brace assembly (from 26-13) straight (I suspect this wouldn't be the issue)?
For what it's worth, I had the opposite experience: I had to gently sand mine down
to get them to fit without resorting to force. That suggests that fitment might vary among kits due to builder and manufacturing tolerances.
Also, it's hard to tell from the picture for sure, but it looks like your AD4-size rivets might be a little overdriven. That's unrelated to your issue, but something to doublecheck for future rivets.