In this Special Edition of the Sprue Cutters Union (released as a bonus episode in addition to our normal episodes) Will, Chris, and Tracy are joined by Jim Clark, Senior Aircraft Judge for the national committee of IPMS USA, to discuss the 1st, 2nd an 3rd competition as run by IPMS USA, and the Open system, as run at many shows including Scale Model Challenge and MosonshowShow Links:IPMS USAScale Model ChallengeMosonshowIPMS (UK)Check out our sponsors!hobbyworld-usaTetra ModelworksInside the Armour PublicationsCheck out the other scale model podcasts at modelpodcasts.comSupport the show (https://www.patreon.com/SprueCuttersUnion)