Hey Mark..!!!
WOW - that looks like it's in terrific shape!!! Somewhere - I posted a thread about my German WW2 HP RIG, so I'll try to find it again..? But - mine isn't nearly in the condition as yours... I'd invite you to do the same with this piece - as I enjoy these almost as much as my Lugers and Colts - and if I could find a grip slotted Tangent WA proofed - I'd probably enjoy that as much as Lugers and 1911s!!!
Best to you!
John