I drop my high rates down about 40% of the throw for low rates. I haven't seen any crashes like Minn said but I have been known to run out of elevator when landing when I forgot to go back onto high rates. One of the reasons I have the rates {but don't use them often} is because I set my high rates quite a bit higher then called for so when I do go down to low rates they are closer to what would be called for in the instructions. It's just how I set up my planes and not something everyone should do.