Hello yunggunnaz!
I think the mossberger spacer is the same as the moosespacer everybody talking about in this forum, a 10mm thick aluminiumplate?
I were at mossberger website,good flowrate for the reedcage compered to FMF and others.
But they say not about the V-force?
What do you mean about "stock cage angle the top of each window for velocity" didn?t follow you there.
I use TDR reeds for a long time now and it?s works well.
But do you not loose gasresponse with a spacer(lowering crankcase pressure)?
But on the other hand, you eliminate flowdisturbence for the boostport at the intake.
I will try it.
You gain proberly lowtorque.