I know what you mean.... I used to run a 32’ with twin inboards
and command bridge. The controls were cable shift all the way!
Pretty exciting when you need both hands to shift during docking.....
I can only speak to my use of these controls, silky smooth and mere
ounces of force necessary to shift and extremely smooth throttle
response. From my Googling of these controls, they are the standard
of the industry and would perform well on a 40’ tugboat with twin
diesels. I just know that they worked very well for me, made docking
a dream. Like my old buddy used to say, “I’ve already told you more
than I know!” Let your own research guide you, but I think these
controls would make a big difference on your boat. I know that
new, these are worth a lot of money, just not to me! Just taking up
space in my cargo trailer....