NHS,
I think it would be safe to say the original 3-D had the same wgt. block
as the offsets had with out the core shift between the flip blocks. Go to
"BOWLINGBALL REVIEWS.COM", click on discontinued balls. Go to Faball and click on any of the offsets. Under 3-D it does not show a picture of the wgt. block
for either the solid or the pearl. I drilled a few for my customers when they came out. The offsets were just the next evolution of the same core.
Bowling is tuff, but the tuff throw Hammers!