That's an awesome image Peter, certainly has a 3D look about it!! You must have found enough counterweights to balance that new STX beast of yours
It may be worth experimenting with the flattener / CCD distance as this can be fairly critical in achieving a really flat field. I found that I could obtain a much flatter field by changing the recommended spacing between my Paracorr / CCD chip from 55mm to 58mm.
