other embodiment trial instrument. [0036]FIGS. 24A and 24B are a plan view and side view, respectively, of a distal portion of another embodiment trial instrument. [0037]FIGS. 25A and 25B are a plan view and side view, respectively, of a distal portion of another embodiment trial instrument. [0038]FIGS. 26A and 26B are a plan view and side view, respectively, of a distal portion of another embodim