Brolga Bill's Puzzles
Brolga Bill decided that, instead of making all the puzzles for the Mega difficult and different, he would construct some that were grouped into types, that started easy and worked through to moderately tricky. Each type has five puzzles in its series.
By this technique he hopes that some cachers who normally would not look at puzzles, will have a go at these.
Good Luck.
Letters
Building on your Letters-Numbers code this one takes it a step further. It is called Digital root.
It reduces the number to a single digit.
Unfortunately, using this technique you can not get a zero.
The Puzzle
South 36 brolga character possible result
East 146 cache puzzle toolbox (zero) digit