There was a detailed article about a bevel box oil cooling system by an American called Graeme Addie in the MTWC Bulletin dated October 2015. It was very complex with a pump, filter, heat exchanger, cooling fan and multiple sensors and appeared to take over much of the limited available space in a M3W. No doubt it worked a treat but it wasn't simple or compact. Hopefully this system will improve on that...
How has Graeme got on with his mod I wonder?
PS: his earlier Bevel Box issues described on pp20 at
http://www.mogsouth.com/wp-content/uploads/2016/08/MOGSouth-Newsletter-1_14r6.pdf