Buzz, I will 100% guarantee that if you go brushless that your moth will see any altitude you dare to fly at.
Hi Luis, here's a thread on the building of my second Pico Moth explaining and showing pics of the mods I used.
As Wes mentioned for relaxed slow flying it will do fine completly stock. With the 7 cell Nimh battery pack I recommended the battery bay will have to be widened a little bit but it's very easy to do. Even easier if you do it before gluing the fuse halves together.