Housings manufactured since early 2017 feature a curved shutter lever to operate the shutter button (and rear button focus where applicable). The rapid shutter lever imitates a curved trigger for greater sensitivity and faster reaction times.User feedback indicates that, depending on shooting style, some prefer the shutter button and rear button focus levers to be oriented a little differently than the standard design. In August 2020 we will introduce an updated Trigger system to address these needs. The improved V2 design allows for 16-position attachment to provide customizable ergonomics and precise adjustment.Starting in August 2020, the new v2 trigger lever and v2 trigger extension will ship on new production housings (serial numbers 73600 or UC65140 and higher).Older housings with curved levers can be upgraded using the optional Trigger Lever Upgrade Kit #4077.94 and Trigger Extension v2 #4077.95.