I have done now 10tkm with mine Shiver'ed forks without any problems - it works if done correctly.
By the way check that if they remembered machine little chamfer/roundin inside the lower leg and to that part were the bigger machined hole turns to slightly smaller machined hole. That edge shouldn't be completely sharp or it will 'cut' slice from your base valve's O-ring seal (or damage it) when you push the valve to it's place - seal could start to leak later on.