Can't find the last 4 moves, atm. Very tricky.
EDIT, a month later: I finally managed to find the 76 path, too. Now it doesn't seem so tricky, anymore, heheh. :)
Woooow, this is a very good puzzle. I first couldn't even touch the exit, but after managing that, I slowly came closer and closer, and finally to 249, as well. Really nice manipulation.