As Rich says, the right tyres make all the difference.
TBH I didn't like adding the weight to the battery brace as it felt like it made it wallow a bit. I replaced the foam block at the rear of the battery tray with some lead weights - approx 20g/25g and added about 45g at the front (around the servo area)
You can get purpose made brass weights for these areas, but if money is tight (or you want to try it first) then some lead wheel weights from a tyre fitters is fine.
Drag brake is personal preference too, I don't run any, but as default on the Reedy esc it's 2.5% drag brake, you could up that to 5% if you feel you need more and see how it goes.