Dragon Crafter's Boon doesn't remove Dragon Crafter's Bounty, Blessing, or the Scalecraft techs from the available technique list when applied to a scale.
Dragon Crafter's Bounty and Blessing don't remove anything from the available tech list when applied, not even themselves.
Dragon Crafter's Bounty only adds +2 to scalecraft, stoneworking, and gemworking instead of +4.
server: Chaos