Eptar Reinforcement includes a legitimate demo mode. According to the official FAQ, “Eptar Reinforcement plugin runs in demo mode until you purchase the product. Demo mode functions as the full version but the amount of rebars used to define complex elements and make listing, is limited.”
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If you have determined that Eptar Reinforcement is the right tool for your needs, here is how to acquire it properly: Eptar Reinforcement includes a legitimate demo mode