I have a Thinkpad T43p running Quantal.2g ram 2g processor.I am using a Linksys express card adapter WEC600n V11 to get N speeds.I can get a rock solid speed of 65 mb/s.I have a Netgear range max n150 router.With my adapter installed on a windows machine it will reach speeds of 108mb/s and greater.Is this the limit of the driver? (WL). And if so? Can I increase the speed or will Ringtail have an improvement. Thanks! Vince.