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A305
Ret-ro rules in-line open-wheel chassis; 1220/1306-based design; using two construction methods ( “hybrid-build” technique); all-wire frame with “damper” main rails, separate motor-center-guide section with torsional inner section (wire version of “H” cut) made of 0.010” brass sheet backed with 0.039” wire, and torsional wire side pans.