Can a Wilson Combat Bullet Proof Single Piece Magwell Extension be installed on a Dan Wesson Valor (stainless version) without fitting, or does the installation require files, sandpaper, and an above average level of skill? If I'm interpreting the WC catalog description correctly, I think the magwells just drop in, if you use a non-rounded butt magwell. Only the rounded butt magwells require fitting. I understand that the interior of the magwell extension won't line up perfectly with the magwell built into the frame. I'm not too concerned with this, as it won't effect performance and function.