dear pymol-users I have used CGO to put down 20 angstrom-wide cylinders on the helical bits of a large RNA molecule. They come out with nice rounded ends but I would prefer flattened ends if possible. Is there any way I can do that? Thanks for any help/advice. cheerio for now, Martyn Martyn F. Symmons (Ph.D.) Research Associate Crystallography and Biocomputing Group Department of Biochemistry University of Cambridge Phone: 01223 766020 ----------------------- "Abair ach beagan agus abair gu math e" Seanfhacal Gaidhlig (Gaelic Proverb).