Either way mate a box is a box to me at the moment, I guess you'll have to wait and see what the prices come back like before committing to a design.
Re-seating the idlers in their bosses, is that the old superglue trick?, I haven't tried it myself as mine are oval so was doubtful it would work. What do you reckon?. Also what do you class as round the corner?, just previously fabs hoped for before the first round of the uk national, and we all know what round it is now.
Either way I'm glad I can see a glimmer of light at the end of the tunnel, can't wait to run it again.