Sam,
Thanks for the bump. It's been coming fast and furious since the announcement of the new bike. This answer I'm about to give you pertains to both the new CFR and SLX Disc.... Pad Y of 640 is no problem, that can be covered in the Small, the Medium and the Large...... and the XL can get as short as 644 - which might be acceptable as well. The 525 to back back of pad is tougher. This new bike isn't as long as the rim brake bike and the CFR/SLX Disc maxes out at 508 in the XL.

I've been dragging my feet in response to you and to a few others about this bike as I have a video conference set up with the chief engineer tomorrow morning (in LA, tomorrow night in Koblenz, Germany). I want to make sure I know it all. There maybe some additional pieces that allow for expansion on these numbers and I want to ask about.
For example there's an armrest upgrade kit and I'd like to confirm what that does to the Pad X numbers:



If anything changes I'll let you know here.

Ian

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Ian Murray
http://www.TriathlonTrainingSeries.com
I like the pursuit of mastery
Twitter - @TriCoachIan