the wico ball-top handles are not the same length as the stock p360 bat top.
i don't have measurements for the stock bat-top handy, but i do have measurements for the wico ball-tops. you'll have to measure your bat top, with whatever spacers you have installed, and then compare to the following measurements, which are all from the top of the joystick base to the top of the ball:
4" wico + p360 "wood" spacer - 3 1/8"
4" wico + p360 "metal" spacer - 2 3/4"
4" wico (no spacer) - 2 5/8"
3.5" wico - 2 1/2"
these measurements are somewhat rough; i just measured by eye with a ruler, with no precise parallax correction.
i'm pretty sure the last two measurements (4" wico with no spacer and 3.5" wico) are actually identical, even though the numbers i listed differ by 1/8". i measured them at different times and never went back and compared them to each other directly.