fdx- How much shortening of the effective top tube length are you planning? Will this shortening result in toe/tire overlap (and whether the overlap is acceptable is another question)? Have you accounted for the lowering towards the ground of the head tube's bottom (assuming about the same amount of HT extends beneath the lower surface of the DT), of are you good with the raising of the BB height and slacking back of the ST angle?

I guess I wonder if this is all an experiment for learnings sake (in which case all out questions and suggestions are moot) or if the goal is to have someone use this modded bike (and that person isn't you). Andy