Thanks for the comments Ken. I might as well bring everyone up to date on my fret issue. Spent the Spring in Mountain View AR. Went to the music shop and asked if they would re-fret mY dulcimer with stainless steel. They thought it was a really bad idea. The sound would become tinklier and the stainless frets would saw through the strings rapidly. So, I sort of gave up on the idea.
However a couple of weeks later I was at a jam and Jim Woods from the Dulcimer Shoppe was there and he was playing a chromatic dulcimer with EVO frets. I asked him about the sound issue and he didn't think that EVO would make much difference in the sound but he did think EVO might increase the sustain a little. I played with his dulcimer for a while (poorly, all those extra frets were confusing). I thought it sounded okay so I asked him to Re-fret my dulcimer with EVO.
After I got it back, I decided the following:
1. it might be a little brighter in tone to mY ear plus some other people said they thought it was a little brighter. However the difference is fairly small.
2. The sustain definitely increased but I like that.
3. I personally find fretting easier on the EVO than it was on the German silver.
i am happy with the outcome but as usual wit's these kinds of issues, your mileage may vary.