To promote good vfr nav planning the CAA and GASCo are advocating a 2Nm mile lateral buffer from CAS. Seems sensible to me. Would it be worthwhile having a selectable ‘X mile’ buffer around the routeline or WPT that generates a planning caution? Sometimes it’s appropriate to fly close to CAS but I do see folks planning a gps glancing blow without much justification. This feature might help reduce some inadvertent airspace infringements.