The project spanned a couple of years (beginning with the original mods & ending a couple of months ago with the addition of the gen bezel/insert/pearl combo), but I think the total cost (excluding my time/labor) was around $2,800.
The Great White is certainly easier to wear since it is much less rare & I debated long & hard over whether the faded or non-faded gen bezel looked better on my 5514 or 1665. Ultimately, as you can see, the 'dweller won the prize.
The working valve just looks more authentic than any of the alternatives I tried (or that I have seen on other watches), which is why I went the extra mile to make it work. Others have suggested that their MBW came with a working valve, but, as indicated in my articles, my MBW's Hev was engraved. I cannot recall which watch the valve came from, but this was explained in 1 of the articles linked to the article I referenced.
I posted a mini-tutorial on the process that you can search out, but, as I recall, the only problem I ran into was having to trim some metal off the (replaceable) calendar ring on the movement to allow the movement to properly seat into the MBW case. Other than that, everything lined up as if the case was made for the 1570. But you might search out that article to be sure since it has been a quite a while & my memory is occasionally fallible.