Any chance this mod is still worked on ? :)
i would assume so seeing how it's been updated to work with the latest KSP version, ive noticed a couple of things that takes away from the experience and usability of the engines in this pack.
stock engine clusters has the pivot point at the bottom of the thrusters, but i noticed that your engine clusters has the pivot point on the entire assembly, essentially only giving 2 axis control, any possibility of changing this to make it feel more like the engines in game, without it being to much work for you ? :)