I don't see the point to be honest. This is what the Forge site says...
"By relocating the valve in this way there are two benefits. Firstly, due to operating in lower temperatures the longevity of the valve is increased." Really? The Forge ones are so much better than the OEM DV anyway, do you need it to last even longer?
"Secondly, after relocation, the air that is recirculated back into the intake tract to the turbo will be cooler. Cooler air has a greater density. The greater the density of the charge mix in the cylinder the more power generated on combustion." Cooler air going into the turbo will get heated to the same temp as the ambient air being sucked in I reckon!
Just my thoughts. I would maybe concentrate on spending money elsewhere first...