Has anybody completed level 597 with the rubber bomb? I feel it is impossible. I did complete it with napalm. Tricky, but possible, taking about 10 attempts. I saw a YouTube using the laser and yes, 597 would be easy with a laser, and indeed with some other guns. I try not to go to the easy route on these, especially with the laser. The laser is much easier on nine out of 10 levels, but does get tricky in a few! I would like to be able to do every level, with every gun!