Designing a Tortoise Tue, 2 Aug 2011 tutorial Description I thought you might be interested to re-read this series of posts from early last year in which I go through the design process of creating the Tortoise model. Once completed, members can download the model for free. Non-members can join in the fun for a small fee. Related Comments (1) subscriber August 8, 2011 at 2:59 pm This is a comment. This is a comment. Comments are closed.