couple things.. first, the dip tubes are really thin gauge stainless - you could fix any bend in it by hand.
The other is that I have ball and pin locks, the pin locks have a straight diptube and you can see on the bottom of the keg that the channel where it sits is sort of against the side of the keg. The ball locks, on the other hand, have a curved diptube that ends up near the center of the bottom of the keg.
Bottom line, as long as the diptube sits okay on the keg post and reaches all the way to the bottom of the keg you should be fine.