That looks like a very neat setup you have there allanflowers. Yes, no Ackerman works but it is very hard to achieve, that is why I recommend that you put in a bit of positive Ackerman because the slightest error in construction can wind up giving you some negative Ackerman which can be catastrophic due to excessive current draw on the straining servos. I also always route my lines through tubes in case I ever want to restring one or change one out for some reason, it makes it real simple to do. IMHO the two most common mistakes people make when they first install a pull-pull system is to accidentally get a bit of negative Ackerman built in or are making the cables to taunt. You want them just barely tight enough so there is no sag in either cable at neutral.