Sorted my Rx200 with new 510 and custom made glow in dark buttons and yellowygreen screen... What a fuckabout!...and like already said; only attempt this if you can solder ect.
I would really like to install a better 510 on the Wismec DNA200-I just need to get the balls to do this to the mod lol! I think for now I will use washers but this is a great guide, and if I did need to install a new 510 on any of the RX style mods, this will be very helpful.