The tape that I used was 41" long and 1" wide - you can see that I overlapped wraps though.

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my blog CastingAround
Ebisu, Iwana 11'ft (with additional short handle), Amago, Ito, Ayu II

Anthony - Thanks.

I'll go for 20' of 1/16" and do a double wrap to give me another 1/4" in diameter.

I super glued a cut down rubber stool/table leg foot to the metal butt cap on my Amago rod, then I filed the diameter of the rubber foot down enough so that it would snugly fit in the rod tube with the rod in the rod sock. This made the rod a little longer and had a slight counter balancing effect on the rod, plus it gives a better nonskid surface to the butt cap and keeps it from getting scratched up in normal use.

The metal butt cap could be drilled out and refilled with melted lead, which would be a little unsightly but the rubber butt cap would hide what was done from sight, with a significant jump in counter balance weight being gained. Since the weight is being added behind your hand on the rod, I doubt that there would be any negative affect to the rod's casting action.