I didn't, I was inspecting the turbo when I was install new DP. Looking back, this could be why it was a little sluggish off the line (very little, if you didn't drive the car very day from new, you'll never notice.) & my peak boost was down .5 psi. from 16.2 psi., but was still hitting target 15.5 psi.
Sense then I went stage2+ at 174k & was custom tuned with this issue. Still hitting target & peak boost numbers 35k later.