Board Thread:Fleet's Prepared-ness/@comment-31118942-20170730140825/@comment-26366865-20170730181611

Perhaps I should have said explained it better. I have 7 35.6cm at ☆9, and haven't used them in well over a year, simply because I have obtained far better guns since them. All those screws are effectively wasted, since I don't have any plans of upgrading any of them further.

As for the screw efficiency part: fact is, getting a proto 35.6cm by upgrading is more expensive in terms of screws than getting a similar gun, namely Bismarck's 38cm kai. Getting a pair of proto 35.6cm costs 38 screws, assuming no slider and no failures (which is pretty much impossible, realistically speaking), while a pair of 38cm kai only costs 32 screws (had you converted 2 BP worth of medals into screws). We can sit here and discuss the worth of medals x screws for weeks, but it's a fact that the default 35.6cm will inevitably become useless as the player progress, and so any screws invested on them are wasted. Considering the OP has other worthwhile equipment to upgrade, this simply isn't a good investment.