Well since the original post, I have tried 15mph winds across, against and with the runway and can safely take off and land without any dramas as well as fly about the place.  I did find it a bit harder to bring the LT-40 down heading into the breeze though.  It floats in really slowly unless I give it a fair bit of throttle and point the nose down a little.  Cross winds weren't really a problem for me although I think I need to practice a little bit more using the rudder to straighten up just before touchdown.  But it didn't appear to be a problem landing on a slightly skewed angle?  Not sure whether thats a true indication of what happens in the real world though?