Could you confirm you had all levers on the throttle console fully forward when you recovered from the stall and that carb heat was ON. I just tried 3 power off stalls and could not replicate the problem. However, I did try it with carb heat off and had engine trouble. Turning the carb heat on recovered the engine to normal operating speed. I doubt it is a Duchess bug and I will explain why. When animating the gauges, Blender doesn't recognize the 180° angle. It only recognizes up to 179.999 and then it goes straight to -179.999 and back up to 0. That is Blenders circle and it is a pain to work with. Especially with circular gauges. The way I animated the Tach gauge was positioning both needles at 0 BEFORE adding an armature to it. The armature moves the needle through its animation and also has the dataref attached to it. So both needles were animated in the exact same way using the exact same values, EXCEPT for the part number of the dataref used. They both use the same dataref (same line of code written by the x plane programmer) but part numbers are given (where available) to distinguish between part number (engine number) 1 and part number 2. So eliminating everything and assuming you had all levers fully forward and carb heat on, I would say the problem lies elsewhere. Redline and Blueline indicators on the ASI will be added in the next update. Good to hear about the ASI. I have the carb ice warnings turned on, so I would've been aware if that was the problem with the tachometer. As I said, I tried just about everything (including a shutdown and restart) to get the needle to move and no dice. It's only happened once or twice, so it's not a huge deal, but I just thought I would report it. I know the answer to this one! There's two rows of buttons on the audio panel. Regarding navaids, the top row is 'on' and the bottom row is 'off'. For some reason (almost certainly a limitation of X-Plane) if you're halfway through listening to the ident and press the off button, the sound continues until the ident's finished playing. Unfortunately, the statement I emboldened is not how that B-K audio panel works in real life. The latter statement I understand and is acceptable to me. I'm familiar with stormscopes. I was mostly referring the fact that the buttons don't work. Good to hear about the lights. As far as the brakes, I have toe brakes on a pair of Saitek pedals. When I had this happen I was applying full brake pressure. I haven't had it happen since I started only applying about half pressure unless stopped. As an aside, I haven't adjusted any parameters on the aircraft at all.