Keep the formulae coming 170'. As previously stated we are often given tasks we have never done before so we work it out at the time & we do things a certain way because it works. It's good to have some academic reasoning to back us up when defending our methods on the back of a coaster at the pub.
Just a thought - The ability to work out the best way to complete a job without prior experience & keeping everyone safe is what makes a good utility pilot. Lowlevldevl had a problem & solved it with a Koppers log up the centre of the tower - thinking outside the box.
P.S. - Your assumption is correct 170', LLD is a very experienced pilot.