Thanks Ken.
It has only just been thrown together. I'm slowly working through each of the variables and improving them.
The large black lines do seem to be from overexposure on the chip.
Collimation is sort of close, if you know what I mean, and needs more work.
The colour image is an oldie with the BAA in its early days, just used to see if I could find some lines for callibration of the optical train.
Now the long, slow, serious allignment and focus begins.
