Overhaul of Workbooks 3 and 4 on 20/03/2015
All workbooks are being rewritten in the light of feedback and rethink.The version for all Workbooks will be updated to restart at version 5.0. So far Workbooks 1-2 have been updated.(23/02/2015) and
Workbooks 3 and 4 on 20/03/2015. And Workbook 5 has been temporarily withdrawn for updating to make compatible with new Workbooks 3 and 4.