Material used in this 4 dent reed:
#21 tarred twine, covered with 10.5 mil gaffer's tape when finished
5/8" hard maple dowel with 1/8" wide by 1/4" deep groove cut with table saw
4-1/2" long 1/8" ø SS rod, friction fit into dowel slot.
copper pipe ends, slotted with 1/2" wide aluminum strip to clamp/bind the ends.
Progressing along on this 60" reed, I have another 20" to complete. Slow work. ;)
This reed should also double as a 8 dent reed with 2 ply wool doubled in the dents.