The gene needs a bit of practice Topher and the information about how to roast in the manufacturers guide is complete rubbish (the temps are far to high for a start). One of the main tricks is to reduce the heat input after 50-60 seconds or so of first crack, this also prevents scorching as it reduces the thermal gradient within the roasting chamber and a 250g batch size seems to give the best results.
The roasting is rather counter intuitive in some respects to the larger drum roasters, so it's just leaning to modify your technique. Once you get the knack, the roasts are reasonable and not far off what can be achieved in the drum roasters....they certainly lack the brightness of a fluid bed roaster like the I-roast.