I just completed a 400k PBP qualifier in New Jersey last Saturday. Most challenging thing I've ever done for more reasons than the cycling part. Weight distribution became a serious issue in the last 60 miles. Right now my wrist and sit bones are killing me. My two riding partners had very smart rando-style set ups. Custom steel frames made by David Kirk with slack geo, brooks saddles, wide bags on front and rear. Me however, had a aluminum Specialized Transition from 2005. Short wheel base, 700x23 tires, compact geo and a long rear rack that makes turning feel terrible.
Even though I've become accustomed to this bike after completing the first three brevets with it, I feel like it's less than ideal for not only the 600k but PBP. Actually, I feel like I'm be punishing myself if I took it to France. On the other hand, I'm hesitant to change bikes this far into the qualifiers. I've read an initial warning against this in the RUSA handbook.
So here's my logic. I take all the measurements of this current frame then find a new one that isn't as aggressive in the wheelbase. Then I can fit some wide tires and english style touring bags on the front and back, ditch the long rear rack and get a Brooks saddle for that extra something. If I can do all this in a week and a half, I can fit in a century before the 600k and break everything in.
What am I missing? Is this a worse idea than slugging it out with a tri-style bike that I already know fits?