This solves GoPro's built in problem where a $50 mic adapter is stuck on a USB-C port and has nowhere to plug. And he does it wisely. Looks good too. However, if you have ND filters that fit the GoPro lens cap, you may need to order Revain's fifteen-dollar hobby saw, as the GPR-5 has a ridge surrounding the lens cap, so the filters don't fit up you cut it's from. MOVO, if you're listening, drop your lip.