Shrouded in Mystery

Printing new parts for new arm, one of which was a 40mm fan shroud, but the gremlins where messing with the hotend temp and it wasn't keeping temp' thought I might have bunged it up in the process, so had to dismantle to investigate, this was the perfect time to attach the new arm and test it out, so on it went, checked all the wires to hotend dismantled and reassembled. Time to solve the mystery oof the non printing fan shroud..tempted to just print a test cube, I decided to skip that as first print on new arm, and go straight to the turin shroud...a trick object as it has quite thin walls thinner than Ive tried before, no layer fan on at the moment, so interesting to see what happens.