Hey you FlexJet users out there...

We just bought a new Universal machine with a FlexJet head on it. Excellent machine. However, I'm still in the learning stage and having a little trouble with 0402's and 0603's (caps mostly but resisters as well). I put 0402K-FJ bladed and 0603K-FJ bladed nozzles on the machine but am finding that the vision system wants to read the nozzle tips at times and the pick rate is not the best so far. So... what is the most kick-butt nozzle/lighting combinations for these two sizes of parts? Are there any component database values that I should be tweaking to improve on this problem?