Fx impact, venting shroud

Hi all,
Having thinned out my collection a bit I'm now waiting for my impact. E.T.A. End of August :)

Looking at the shroud am i right in thinking it's not back vented?
Having watched E. Rowes' shroud video I thought why not vent air back through the fixed portion of the shroud? And out near the extra picatinny rails?

I've seen shroud adapters letting you put a screw on Ldc?

Would be worth a try?
 
The back of the Impact shroud is not vented. The "shroud" when extended is nothing more than a enclosed chamber with an o rings and a gasket in the back. I got better accuracy when I removed their factory shroud and added a Huggett

So far I'm not impressed with my Impact .25/.30 It may be up for sale by the end of this week at my purchase price.