I actually got it to work. Please excuse my noobness as I'm not 100% familiar with github, etc. But I set up an IDE based on the KSP wiki instructions and made a couple quick changes: I changed line 1279 from: else if (p.Modules.Contains("ModuleEngines")) To: else if (p.Modules.Contains("ModuleEngines") || p.Modules.Contains("ModuleEnginesFX")) Then I replicated this block of code at 1283, only I replaced ModuleEngines with ModuleEnginesFX: if (pm is ModuleEngines && pm.isEnabled) { ModuleEngines me = (ModuleEngines)pm; //double amountforward = Vector3d.Dot(me.thrustTransform.rotation * me.thrust, forward); if (!me.flameout) { thrustmax += me.maxThrust; thrustmin += me.minThrust; } } In other words I copy and pasted, I did not replace. After compiling it, I successfully used it to send a vessel towards Duna using FTmN. Hope this helps.