The thing is, I've had engines fall off my rockets at times other than take-off. Another problem I encounter is with really powerful stages; if I'm over-generous with the throttle, it can get 'stuck', which greatly increases the chances of my Kerbalnaughts exploding in mid-air or crash-landing, due to being forced to either try and wrestly back control until the fuel runs out or attempt to eject the faulty stage (which can be a dangerous since there's a good chance the ejected but still-burning stage will simply accelerate through you). Thoughts: The throttle sticking issue appears to be a natural consequence of my tendency to over-engineer things - One of my latest designs, and the one with which I can say I am most pleased with performance-wise, is the Kratos MkI, which has as the lowest stage a cluster of nine E-600 engines with 'big red' SAS modules. I reckon the best solution here is to just take care with the throttle. With great power comes great responsibility. However, in the event that a stage does get stuck in such a manner, the thought occurs of including a more explosive coupler or even a dedicated rocket motor to ensure a safe seperation distance. Here's an image of the Kratos MkI, perhaps the first truly stable large rocket design of mine: This thing is powerful enough to get into LKO without expending any stages: