Tail Feathers

Finished stitching the first 3 tail feathers for Tommy Turkey's tail.  I'm pleased with the stitches, but might want to add a little "bling" to the red ones.
The finisher might need to top stitch the edges of these, so I don't want to bead them and am considering hot-fix crystals.  I've never used them on needlepoint before - is there any danger of damaging the silk fiber when applying the crystals?
HINTS are welcome!!!!!!!