A MapDaddy isn't really needed in this case, that's just if you're going to be actually boosting greater than 250kpa.

You just need to set the boost cut limiter higher than than what you'll actually be hitting, by 10 or so points generally. 10kpa is only about 1.4psi, so you'd know if you boosted 1.4psi over where you aimed to be at.

It's a hard fuel cut when you hit the limit, so you don't want to set it too low or you'll hit it and wonder what the heck just happened as above. You want to set it as a safeguard...