@jonbradburn,

Unfortunately, going through the emulator for the 305, there are not too many options that will result in a speed increase more than what you have already done. However, you may have luck changing settings on your router instead. Unfortunately with Range Extenders, there are multiple places along their path where speed is lost. For one, the Range Extender will have half the total received speed just so that it can communicate with both the router and PC at the same time. There is also a great deal amount of speed lost over wireless communications, as the data has additional information passed along with it so that the computer knows how to assemble the data on its end.