Having finished the Fowler and the Planet I've raided the now slowly depleting kit stock and decided on my remaining Impetus kit, the 'Big Bagnall' 0-6-0.  The construction of one of these has already been covered by Adam on his thread -   http://www.rmweb.co.uk/community/index.php?/topic/30496-preston-docks-bagnalls-impetus-kit-and-prototype/page-2   but I will possibly tackle some of the elements slightly differently and it will be P4 rather than EM.  I'm not following any specific prototy