further to this, looking at the exploded drawings on the CZUB website. There is a small box labelled SP01 detailing the right side safety and it shows a detent shaped differently from the one on my SP01 and a spring, which mine, and obviously many others, do not have. However the drawing of tactical sports model does match the detent in my SP01. Has the SP01 been redesigned to use a spring, and can it be dropped into an older SP01 which did not come with a spring.
thanks, Cliff