I did this before to use with a vx1000 while i was trying to find an MK1.
I used a hacksaw to cut it off, the cut was clean, but i found it difficult to ensure the threaded adapter sat centered and flat after applying JB weld. It ended up with a somewhat uneven vig, which was only sharp when fully zoomed out, the vig was also slightly bigger than i wanted.
I ended up just zooming the footage very slightly in post to adjust this, that way i could make the vig a little more centered, and make sure it stayed sharp. Cropping VX footage is never really good though, this would prob be better on a HD camera, fully zoomed out, cropped in post.