If you haven’t seen them already and are interesting in Laura’s thoughts on vocal technique, there are two videos on her Youtube Channel now that explain her idea of the appoggio (breath support), giving exercises and examples for students to try:
Article 1: http://opusmagazine.co.il/article/vocal-technique-by-claycomb-part-1/
Article 2: http://opusmagazine.co.il/article/engvocal-technique-with-laura-claycomb-part-2/

https://youtu.be/PO-qo3ITmDM
https://youtu.be/ycJKbfcZ1CI