Put on a FMF header and can... After some fussing, I'm still left with this gap - it's a couple mm max. On startup and a quick poodle around the block, I didn't detect a leak. Is this okay to leave? Or is it guaranteed to cause more issues? I might be able to use some spacers at the mounts to get them perfectly straight, I guess? Just wondering if I'm being over meticulous / anal?