[Callipygian]

Thanks for the replies, frevett and reach.

@Frevett: Yes please to Karst solution! I managed to 2-off that in many ways, but the solution really eludes me. As for breakthroughs, I have only 2 or 3 and haven't even looked for them, so I can't be of much help there.

@Reach: I'll PM you hints for lockmess and maelstrom. I'd love to get some help with warehouse duty (4 off), wiggle room (2 off) and pipe organ (2 off). Also having trouble with bunker buster and the first two maps of XIII, but I haven't quite given them enough attempts yet.

EDIT: Just solved the fourth wall and feel stupid for not seeing the solution before. Technically this level isn't even so hard.

EDIT: solved four's a crowd and spurn (not sure how spurn took me so long to figure out; it's so obvious once you see it :P)