BTW. I did the Treasure Hunt and there's only 3 Velocidrome in it. I never got any Velocidrome heads
soz, i got the wrong quest, its the gathering quest hr5, you start off in base camp and there is a massive rock in your way, just keep attacking it and it will eventually break, there are loads of them around and most areas will be blocked of by them so its best to do it in multiplayer, there will be a ridiculously strong rathalos and a vdrome so keep your distance from the los and go after the vdrome,you should get some heads from that and when you complete the quest you should get some in the reward, you have to kill the velocidrome to get it though, its best to do this in multiplayer otherwise you run out of time trying to break the rocks!!!!!!