Hey Ferd.
I’ve been using that one for a couple years.
Here are some other useful links I use for my builds.
Cone Generator
http://www.hardijzer.nl/MinecraftCone.html
Golden Ratio Calculator
http://www.radovleugel.com/golden-ratio-calculator
Mine Conics
http://www.mineconics.net
Plotz (My Favorite)
http://www.plotz.co.uk/plotz.php
Using these in combination can yield some really spectacular results, even on huge scales