Fueling & Injection - Issues With Installing Injectors Into FAST Truck Intake

So I received my FAST fuel rails for my LSXRT intake today. Injectors fit into the rails just fine, I can get most of the injectors in to their spots but some just don't want to. Now I did get my FAST intake used and the previous owner gave me the o rings as well but I'm wondering if I might be better off ordering a new set from FAST.

and yes I did lube them up and I used some clean motor oil and just rubed in on with my fingers around the o rings

http://i17.photobucket.com/albums/b77/coderedzq8/f181604d.jpg
http://i17.photobucket.com/albums/b77/coderedzq8/364508b6.jpg
http://i17.photobucket.com/albums/b77/coderedzq8/20ae2a78.jpg
http://i17.photobucket.com/albums/b77/coderedzq8/cf982ef8.jpg


factory O rings

http://i17.photobucket.com/albums/b77/coderedzq8/e7b15617.jpg

finally got it but man that was a pain in the ass