After getting in contact with the owner of the GeoCoordConversion project, they've kindly added me as a committer. I've now pushed the fixes up to it, rebuilt the DLL (now v184.108.40.206) and pushed up the latest DLL to the Ordnance Survey Importer project on GitHub.
Wednesday, 13 March 2013
In a post last year (Ordnance Survey Data Importer Coordinate Conversion Accuracy) I looked into an accuracy issue with the conversion process within the GeoCoordConversion DLL that I use in this project (blog post). Bottom line, was that it was a minor with an average inaccuracy of around 2.5 metres and a max of ~130 metres by my reckoning. I've since had a few requests asking if I can supply an updated GeoCoordConversion DLL with fixes to the calculations.