Ukraine is showing Western allies that they can't keep relying solely on highly advanced, perfect weaponry. Wolfgang Schwan/Anadolu via Getty Images Ukraine is showing the West its focus on "perfect" weapons is flawed. A drone radar firm says ready-now solutions beat perfect ones later. Officials say weapons must be affordable, available, and adaptable — not flawless. Ukraine's fight against Russia's invasion is showing weapons makers and militaries that the goal isn't perfect weaponry — it's having systems that are ready and working at scale. The war has generated a host of lessons for Western allies, including the US, one being that a focus on perfection can leave stockpiles too limited and too slow to reach the battlefield. Among the growing number of defense companies recognizing this shift is Robin Radar, a Dutch company that makes drone-detection radar systems used by Ukraine and US allies in the Middle East.…