Mod 2 took me about 160hrs before the brush-up. That is just the time taken to read and do progress tests. But as pilotmake says, you know the answer better than anyone. Anyhow...
The QB can be completed during the brush-up course as per Mod 1
Also, you have six weeks not five. That should be enough for a Mod 1 veteren, so long as you can dedicate yourself to it full time and not for one moment think "I start tomorrow".