about "eyelashes" they aren't a tension thing, they are a speed thing. If you tension is fine going straight, then it's fine.
When you get eyelashes, it's because you are physically moving the fabric too fast based on the speed of the machine. If you want to move your hands faster around a corner, then you also have to put your foot down on the pedal a bit harder. Just like driving a car, if you want to go fast around the corner - STEP ON IT! LOL!!!
Seriously though, this is a number one problem newbees have with FMQ - getting a good coordination between hand speed and foot pedal pressure.
It's the main reason I have a speed control device on my Bailey, though I can still move it way faster than it can keep up.