Well done if you attempted the 3 letter word chain puzzle. It  was harder than it looked. I had two replies one of 34 letters - well done Maire, and another of 74 from Wanda. Here is her solution

I managed a longer list with only 4 unused letters and 2 unused blanks. 

Even if you didn't have a go at the puzzle, do study the pictures above..you may learn some new 3 letter words.