It took a while to change my tactics and get the 31. I get this "tunnel vision" too often, when I should be looking for alternatives. Hmm, I should be kicking myself for 6 unnecessary steps I've been taking for ages. A case of not seeing for looking. First time I tried it I couldn't find any way to the exit, today after a couple of goes I saw a possibility, worked at it and got it. Nice level. Phew, there seem to have been far too many 2 offs there, but at least I got it after a month of trying. First set of goes I found this too hard. Came back later and got it in 3 goes. Another elementary level that's not too easy. 5 stars from me as I found it at the hard end of elementary. 
Insights