Okay that is useful to know, thanks for your response.
When you mention PORTG pin3 - that is a pin that is internal to seed though right? It is not attached to one of the inline physical pins around the seed perimeter?
If it is just an internal ‘pin’, I don’t think that will allow me to easily add an off-seed boot button by connecting to an external seed pin. The only way I see to add another boot switch with your response is to put a version of the RebootToBootloader code you included in every version of the code I put on the seed and trigger the RebootToBootloader function by pulling one of the seed’s external pins high or low. Let me know if your response suggested a different solution and I missed something though.