push the envelope, go beyond normal or safe limits, state-of-the-art, the highest level of development(technology, etc.), cutting edge, the newest, most advanced, like a well-oiled machine, operating smoothly, without problems, throw a spanner in the works, to suddenly cause a problem or complication, be back to the drawing board, restart the plan because the previous failed, blow a fuse, to lose one's temper, reinvent the wheel, to waste time on creating smth that already exists

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