You can ask Vudoo to send you an Eley Follower for the magazine if the filing didn't work. I'd just email them to ask them for a picture. I spent the weekend with Vudoo and was considering switching over to Eley for my Vudoo since it's easier to spot the silver bullet and asked what I needed to do. He said first thing is the filing and the 2nd thing is the follower.
The issue is that Vudoo was designed to be control fed and it doesn't use a feed ramp. Many other rifles are standard push feed so the bullets just slide on a feed ramp into the chamber. Not much can go wrong when you have feed ramps. So Vudoo was designed to feed Lapua ammo which doesn't have those ridges on the bullet head that Eley EPS ammo has and since there's no push ramp to slide the ammo up, the Eley ammo gets caught on the edge of the magazine due to the dimensions of the bullet.
A lot went into trying to get the bullet into the chamber unscathed for the Vudoo. And that does cause complications when things don't quite meet perfect tolerances in the magazine and ammo.
If you want something that will shoot anything, without adjustment or fiddling, I'd just get a Tikka or a CZ.
To be honest, with the target sizes of the general PRS/NRL22 competitions, Having a little more tolerance to random shit on the Vudoo would be nice, even if it cost me a slight decrease in group size.