To MassiveD:
The reason for not altering the dropout spacing of my frame lies in the mechanical properties of heat treated 6061 aluminum. Once heat treated, the crystalline structure of the alloy is not very ductile, and will fracture once too much deflection in induced, rather than simply bend.
Impact can cause a bend to occur without fracture, but that is way beyond my capabilities. Ever notice how an aluminum derailleur hanger will bend in an accident, but efforts to straighten it usually end in breakage??
Anyway, I'm enjoying the novelty of working with 8,9,or 10 speeds in a 126mm spacing.