Like Spudnik said still +3. SA's and over enchanting are totaly seperate except for duels. On duels the SA is automaticly added when you over enchant to +4 anything higher or lower does nothing to the SA for duels.
The only exception to this rule is when dealing with Mammon. If you upgrade a weapon you will loose any enchanting on your weapon. If its an even trade (duels) not sure about other weps the enchants stay on the weapon. You have to remove the SA on a wep (except duels) to trade it too.
With Mammon, if you trade a +6 Weapon X for Weapon Y, that Weapon Y will also be +6. I've also enjoyed this effect, especially for C grade-- a +6 Homu sells for much more than a +6 SoWD or a Dark Screamer.
Ya I here that the best way to get a ++++ homu is to ++++ a dark screamer then trade with mammon.
Oh dam was that a secret LOL
its all a matter of luck.
i can blow up a dark screamer just as easily as i can blow up a homu. i avoid the middle man and + the homu; its just less time spent for the same outcome.