what is 'nail mod' pickup spacing?

[Orpheo]

http://www.warmoth.com:80/Showcase/ShowcaseItem.aspx?i=M660&Body=2&Path=Body

what is that?

 

[Mor Paul]

I believe it's closer to how Jerry Garcia had his pups done.
Btw, Nalls mod.

 

[exalted]

Pickups are closer together so you can use one large pickup ring.

 

[Super Turbo Deluxe Custom]

Page 2 shows the routing, and page 4 shows the pickup ring of this Warmoth WGD with nalls mod.

http://www.unofficialwarmoth.com/index.php?topic=8823.45