Hey Bell, if you're pulling them with your dominant hand one at a time, you really shouldn't be struggling that much. Yeah, you got to put a little muscle into it but you don't need rockin' biceps to do it. I attached a hi-res photo of my Mojo trimmer (set halfway) for you to compare to see if something is obviously wrong with yours.
You might also just have defective clamps. If you bought the glider new, I'd suggest contacting Ozone. Also note that if you've been regularly flying the glider for a year and want to fly it a bunch more, then an annual inspection could be warranted and they could fix your clamps as part of the process.
I also saw KyleO's bar tack video...good stuff. If you've got the sewing skills, it couldn't hurt to throw some in. I just tried positioning my trimmer on my wife's sewing machine and it's going to be pretty tough to get a bar tack in so close to the tail. Good luck with that.
Yep, I'm loving my Scout. I'm glad I went that way. I was actually just flying it this week with one of the guys who was on that Iceland trip with Tucker. He was just gushing about how amazing it was there...I'm super jealous. I need to get my skills up so I can join one of Miro's Iceland adventures in the future.