I have had a couple, you know Modded Fiddy, Modded 217, 183, 177 which i turned into this and a 36 destro my daughter built, I only have the last two now.
ETA reversing wheel will not fit as the pinions are larger, francisco did mod one but it is not for your average person to do.
I am working on a list of compatable parts that can be swapped for A7750 and swiss 7750
Main spring would not fit, on the one i tried the other day, the hole in the main plate was to big about 0.3mm to be exact on the asian, the solution would be to drill the main plate and jewel it, but we did not have the correct size jewel at 11pm sunday night, bit of a shame actualy as i had a box of about 50 new swiss main springs available
A good move i practiced first on a cheepy, I still insist this is one of the most comfy i have, i have been wearing it for the last couple of days, including my run every morning and you barly know you are wearing a watch.
Guys i am half way through an MBW red 1680 but i am stuck looking for a bezel and retianer, the case is modded, CGs, lugs ect is someone like cat just needs the case and already has the bezel i would be willing to scrap the project and sell the case, or if some one is scrapping their project and has a bezel and retianer then i would be willing to buy your bezel.
I fitted a clarks T19 to a 1665 white and was very happy with the result due to the price of a t19 compared to that for a T39, if you look in my sig there should be a couple of pictures about of it