New rambler x30 owner, but 14 year experience riding easy racer gold rush, previously owned catrike expedition. On first ride on rambler I experienced heel of shoe contact while pedaling during normal ankle rotation through full stroke and pull at bottom. Crank arms are 165, shoe size 48(11.5) shimano look style pedals bottom 4.5 inch road clearance. Has anyone had this experience who might offer suggested solutions. My sense is straight boom does not allow proper and safe crank arm / pedal clearance!