I swapped for Motul rbf600 for the brake fluid, still need to do the gearbox oil, but careful bout those as some can be too corrosive for our boxes. Amsoil recommended me for my new box (once broke in after 5k miles, which it isn't yet)
"Would not put a fully synthetic oil into your gearbos until you have done about 5 K Miles; reasons are quite simple. Synthetic oils of whatever type are so slipppery that they will not allow the bedding in of the syncro rings.
Once the rings are beded then the advantages are well known. Have qa mineral oil put in and then change it after about 5K As you can imagine I will be only too happy to steer you towards Amsoils MTG at that time. "