I'm currently working on a model of MARINER 10, the 1973 to 1975 Venus/ Mercury orbiter.
I'm hoping to complete the model in about a weeks time (work commitments permitting) but the biggest stumbling block is gathering data for a suitable orbit. Jack is helping by getting in touch with HORIZONS but at the moment it looks like it's only going to be the 3rd and final flyby of Mercury from around March 1975 and nothing for Venus

However on the positive side

http://homepage.eircom.net/~jackhiggins ... riner9.zip
and here's a link to the history of MARINER 10;
http://history.nasa.gov/SP-424/sp424.htm
regards
TERRIER