16V Turbo block stiffening plate! From how much PS at all?!

Hello, again a topic, to the 16V turbo conversion! So far that the engine is running… Well my question, do not build up for the first time a turbo, but why do many people actually take a block-reinforcement plate?! From how much PS would be something SINNVOLL?! Sure, AME does that too, but they also drive with over 700hp in 16V Tubo around… Currently a performance of about 300-350ps is aimed at, later further expandable… Is it really useful to install a block-reinforcement plate now?! MAX. PS should then have about 500ps, but only after a year test drive with the 300-350ps… And later displacement expansion…. ps: I am looking again for a salesman who can deliver sputter 3 fabric storage to me! From business to business!!!! have no Liefranten anymore, since they are away abroad!