Currently running 2012 R2. About to upgrade to R2 SP1 and MDT 2013 Update 1 integrated to start testing W10 deployments

Maybe an MDT question but if I create a new MDT task sequence do I need to recreate the MDT 2013 Toolkit and Custom settings packages or can I keep existing. I am assuming I will definitely need to create new MDT boot image and USMT packages which the MDT wizard gives you the opportunity to do. I read that existing W7 deployments might break if new USMT package is created ??

if you are going to update mdt to the latest version, yes you should also create a new settings and toolkit package (just create a new dummy mdt ts)