L.D. Khatgar has released an improved 1.2 version of his "upgraded" Razor Fighter OPT. The news item on the XWA Upgrade Project homepage
contains a render of the model and a link to the forum post about the OPT, which has the download link (I'd copy the forum link, log into the forums, and then paste the link into your browser's address bar, as only registered users can view the forums). There may be more improvements to this OPT in the future, as well.