Thanks John I've updated the text a bit in line with your suggestions. Forgot the strict in the module! Oops it is back in its rightful place right at the top. I just used the simple $VERSION numbering because this is a simple tute :-) Here is an excerpt from the Exporter manpage for those interested.
Module Version Checking The Exporter module will convert an attempt to import a number from a module into a call to $module_name->require_version($value). This can be used to validate that the version of the module being used is greater than or equal to the required version. The Exporter module supplies a default require_version method which checks the value of $VERSION in the exporting module. Since the default require_version method treats the $VERSION number as a simple numeric value it will regard version 1.10 as lower than 1.9. For this reason it is strongly recommended that you use numbers with at least two decimal places, e.g., 1.09.