Waaaa, this was nice!
I was short stuck at 148, before getting the 136. :) Really fun to work through Hahahaha! Good one! First solving the puzzle as how to go to the exit, and then optimizing. Fun. Well... I tried a bit, got 2 off, took a break, came back today and solved it straight on first try... Nice! I had it somewhat easier on that one. Fun as always. 
Insights