Numb3rs Fanfic Finders

Hi there to everybody, I´m not knew to Numb3rs but I´m certainlly new to these community.
(Sorry if my english is difficult to understan, it isn´t my nature lenguage) Anyway, I have read some fanfics at fanfiction,net, and I was hopeing somebody here could help me find more of that kind (as it seems you guys can find everything jeje).
Sorry... I guess my mind runs around, anyway... the kind of fics I´m looking for are thoes in wich Charlie finds hiself in a extremly dangerous situation, but instead after of going in to panic (or all P vs NP) he acts all logical and aplies his maths and logic to not only get hiself out of that situacion, but to get everyone else out of it, and help the law enforcement in the way to solve the situation.
I guess that I´m looking for fics as "Just a Mathemathician" by Ms.GrahamCracker or "The Unquantifiable Variable" by BeckyS.

Also (I know I´m being greedy here) I would like fics with Don being the ovetprotective brother, only to find that Charlie is stronger than he seems and that when needed his not the only one who looks out for him, since the rest of his team values him, and cares about him as their one little brother jeje.

And... if any of you could point me some Colby/Charlie frienship gen fics, I would really apreciate it, ´cause I just don´t know why I have always though that does to could be really good friends and had lost of fun together af the youngers on the team jeje, if it could be Egrton instead of Colby I think I would also like it, and if you soul also throw there sme iniatially jealous!Don I would be thrilled.

Anyways thank´s to all of you, I pretty new to the fandom so I would really like to use all your help with this one thank´s ^//^