You can check your answers for the following of my puzzles:
GEOCHECK
Alan's invisible sundial, invisible alehouse ....
Ootnai's Gnilkraps Idea
More puzzles where I tell you exactly what to do 1
More puzzles where I tell you exactly what to do 2
More puzzles where I tell you exactly what to do 3
More puzzles where I tell you exactly what to do 4
GEOCHECKER
Double Entendre