Don't worry about how long it takes, it'll take as long as it takes, like you said you'll take it slow. Make sure you don't make a mistake and have to back track. Putting together an Xray kit is easy as pie, best instructions and manuals on the market.
I just got in with my NT1! haha!! Check it out on xrays website. It's a track BEAST. By far the best 1/10th nitro on the market, not even the mugen fanboys can disagree, it's streets (no pun intended) ahead of the rest. I'm a happy bunny lalalalalala.
You got a long wait.