Love this mod. That said, a few things have come up while fooling around with it - 1) I've been having a few issues with the high-visibility cockpit - just how much clearance do you need from the ground to get a Kerbal in/out? I've got a rover that looks similar to your front-page example but using rugged wheels instead of balloon ones, and even with a decent ground clearance Jeb remains stuck 2) Likewise, I've noticed the VTOL rear engine doesn't let you attach anything to it - while I get the engine itself should be left alone, it'd be nice to be able to strap tails to the sides of the mounting, yeah? I can't speak to the other engines and their, uh, mountability, but this one stood out to me whilst I was building my zoomy devices. 3) The science lab seems a little... light. I get it's smaller, and holds less science, but even so I'd expected it to be a pretty heavy payload - and it's nearly half the weight of the stock example, which should probably be the 'gold standard'. 4) I'm also mildly bothered by the fact the nuclear jet is surprisingly light and remarkably high-peformance (even with decent thrust vectoring on a naked nozzle, apparently?) for a pay-no-fuel-ever engine, but that might be my personal sensibilities showing 5) Is it possible to have the Utility section actually toggle between LFO/Fuel/Oxidiser/Monopropellant instead of just having sliders for all three? Don't get me wrong, it works as is, but it feels a little weird that you can a) load a single part up with all three, and you can take oxidiser out but don't get to pack any extra liquid fuel in for your troubles, if that makes sense. I've been using this part a whole lot, because it's awesome, so the incongruity has stuck out. Perhaps this is just a matter for having another mod alongside? I don't really know. Don't get me wrong, though - this mod is one of my favourites, because I love me some Mk2 planes, and this is my favourite parts pack for them bar none. In fact it's the fact I use it so heavily that I've noticed the quirks, and wanted to comment accordingly.