I too find it difficult to believe you will bend that plate unless the screws are very loose. I haven't had an issue with mine and I have also broken off a .308 case head, missed on the lube I think.
I have seen the aftermarket ones on U tube, $35 and Sinclair's site, $69. I haven't heard what Forster wants for theirs yet. I remove mine occasionally to clean and lube under it, not so much to change sizes. So far, I haven't had an issue with containing the springs. As long as one is aware how it works and is, Everyone has a different level so at least there are options now.