Cruiserdrew
On the way there
A photo I borrowed of the twin shift linkage on an H55. I still had to extend the levers with some straight tube to come up in the stock location but you can see the mechanical advantage of this setup:
View attachment 1455528
Cheers!
-Ed
That photo is a blast from the past. But for sure, it isn't an H55! I believe that is my H41/Marlin box with Georg's twin shift kit! Installed 7 or 8 years ago and still in use now.