GG's & John, Peening does not upset the tang of a knife. The end cap is
fitted to the tang.

The tang is tapered.

The tapered tang allows the cap to slide down so far as to tightly
capture the washers and then the tip of the tang is peined.

To remove the cap, file off the peined portion of metal, remove it. Add
your washers use a monkey tool to press the cap into its new position
and pein the tip of the tang.

Should take all of a half hour if your washers are ready to go when
you start.

Good grief. Wes

On Jan 27, 2012, at 6:57 PM, "John Manners"  wrote:
> The effect of the riveting process, hot or cold, seems to be twofold.
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