@theducks - Haha I stand corrected, thankyou.
The problem with keeping the engines running is I'm not exactly sure how much petrol is left in the tank. Speaking only for myself (and user_non/meme have worked on Sigil much longer than me) mine have been running at full throttle for months, 7 days a week up to 14 hours a day. Engines need some downtime for maintenance every now and then...
