Crikey. I do differently to everyone!!
If in 3's I have 3 maomi pinballs as my hypostoppers.
If under 3 them I have 5 of them. Only once caught out when I was sick pre xmas after a huge bolus and even with glucogel could not stop myself sinking but knew I was going to be in trouble so got hubby to call paramedics as I've never had to have an injection from partner I gave up on getting one of these years ago as they just went out of date.
If I've had any bolus within 5 hours I will eat 1 or 2 rich tea biscuit if in the house or something up to 10g carb only if I'm below 3.
I think its all individual to be honest. We all have differing physical activity stress etc and a carte blanche from a consultant saying to eat xx is the consultant trying to help but not necessarily understanding specifics about yourself. I think they are more worried, rightly so, that you get out and stay out of hypoland...