Hi Martin - One thing I found helpful were the tips about arm positioning etc in the classic book The Art & Skill of Radio Telegraphy 3rd Edition which can be ordered through FISTS at http://www.fists.org. I use a paddle so I will not try to offer advice on a straight key - others on the list a far more experienced. SOunds to me like you are making darn good progress though! 73/Tim NZ7C