I just got an E-mail back from Springfield. I was pleased with their response to both issues...
1)They said that the guide rod should not have broke, and that this is not a problem that they have been experincing. He said that they would send me out a new one at no cost. He also said that they would like to take a look at mine to evaluate what may have happened, and he gave me an address where I can send the broken one in if I would like. (I will... If the manufactuer cares about quality, I am all for helping them out!)
2)He also said that I do not need to change springs every 300 rounds. Now that I think about it, I belive that I read that on a site for... well... You know... A site for a spring manufactuer! Go figure! He said that their springs should be good for thousands of rounds, and as long as the slide is functioning properly, and returning to battery every time, that I shouldn't have to worry about the spring to much.
I figure that I will put the one piece Wilson rod in it and keep the one they send me as a spare.
He did also mention that as you reduce slide / barrell length, you increase the forces exerted on many parts. This is due to less length of travel and weight to absorb the energy. He did say that it is no where near enough that things should start breaking though. (Kind of makes sense in theroy, never really thought of it that way though...)
Live and learn eh?