Please identify frame

[yesyesyesyo]

Hello guys,

This is my first post on this forum.
This spring I bought a low cost mountainbike from the supermarket and up to now I used it for 2100 km. It's just a one size bike and I'm not tall (1,68m) and I know the frame is too large for me.

Bercause of the frame size and because winter is coming, I decided to sell it and build a bike from zero but not another chinese junk. I know it will cost more to build it, but I don't have all the money, so this month I got the frame, next month I'll get the fork and so on.

So I got a frame, Giant Aluxx XtC, S size! I bought it from an ebay-like site from a guy, and when it arrived I realised I don't have a derailleur hanger for it. So I started browsing for Giant models, but I just can't identify it, there are so many.

Please help me identify it, in order to search for the right components. And maybe tell me what do you think of it.
Here are some pictures of it, I weighted it and it's about 2kg.

Thank you!

[paulcd]

From some googling I believe it is a 2004 XTC 4 - Giant 2004 XTC 4 Mountain Bike XtC4 Mountain Bike - review, compare prices, buy online

[supersedona]

Good model. I used to have one similar to it and it was the most nimble uphill bike I've tried. Couldn't get used to the downhill characteristics though since my normal ones are a little slacker. Looks like wonderful condition

[yesyesyesyo]

Thank you, the frame looks exactly like mine, this must be it.
First I'm looking for a rear derailleur hanger, so if it's a 2004 XtC frame this must be it:
Giant Rear Derailleur Hanger 138, 16,99 €
Do you think this is the right one?
have a nice day!