C6th with "DCA" Knee Lever Mechanics and Tab

I will start by showing my current copedant. The two C to C# changes on one knee lever are covered by tab posted on my regular tab pages. Then I will show the changes I made to my MSA legend to implement the "DCA" knee lever. Note that my copedant requires 22 pulls on the C6th neck and things can get pretty congested underneath. I had to locate a few bellcranks off center and bend the pull rods to route them around obstacles located between the changer and the bellcrank. I also moved some existing pulls on the same strings to other holes in the changer finger to allow the use of the lowest travel hole in the bell crank to shorten the knee lever travel for this change. Although this knee lever is totally usable, it does require quite a bit of force to activate and I'm sure many would find this uncomfortable. The good news about the MSA Legend changer is that the raise finger had more than ample travel available to raise these strings... no small feat!

A quick note about the rod bends for handling the offset between the bell crank and the changer finger. Make each bend at 45 degrees and leave about 3/4" between the bends and the offset will equal about the space between changer slots.

I was able to re-use some bell cranks and purchase 4 additional cranks from MSA at a cost of $11 each. I had previoulsy purchased 4 extra pull rods and 6 extra nylon tuners. The raise and lower nylon tuners are cut differently and this can work to your advantage. I cut the rods with a hacksaw and made all the bends in a home vise always being careful to save the factory threaded end. Perhaps it would have been better to have saved the factory bend at the bellcrank end as this is a tricky bend to make at home. No matter, this is not rocket science, and definitely within the realm of the home hobbyist. Plan ahead and make the rod bend at the bellcrank side in the direction that provides the most clearance.

I didn't change the gauge of the strings. They are Jagwire (set JC6-15S) purchased from B0B: .015, .014, .018, .022, .026, .030, .036, .042, .054, .068. Perhaps I could reduce the required pull force, travel distance or get improved tone by using slightly thinner strings. If so maybe a good compromise would be to size the strings for the middle of the string's high and low notes.

See the changer end view showing the 22 C6th pulls, to the left of this text.