Being frustrated at this point is not unusual. The good thing I see here is that you are particular, and thatís a positive thing. That little part is not easy to get perfect, but itís not that critical either. On my first airplane I ended up cutting off the messed up bent flanges and making the mini rib that I riveted in place with CS-4ís, and thatís OK to do. If you want to hide your inexperience at this point, thereís bonds/epoxy/filler to cover the pop rivets (I thinks thatís what I did) and it looks better than most done the right way. Good on you for enduring and doing it right. I predict you will do pretty good at upcoming obstacles you will encounter - there are many - and you will end up with a well built safe airplane.