Originally Posted by
abdul10000
This bike store fit me wrong, they ordered for me 62 instead of 60 and they can't even understand that my stretched arms (source of my discomfort) are in unnatural position. I really have no fate in them fixing this problem and try to keep dealing with them to a minimum.
That's messed up. Even amidst all of your anticipation in taking delivery of your new bike you most definitely should have refused or at very least have them fit you properly to the larger frame (shorter stem for your arm issue?).
As for DIY'ing your rear derailleur, search for Park Tools rear derailleur guide and then get on youtube for a good visual. Lucky for you this is pretty easy to do on your own. Honestly, I never even follow the guides unless things are screwed up extremely badly. I just tinker with the limit screws back and forth a bit until I'm shifting smoothly again, more of a guess and check technique I guess..