You just have to consider your current edge, future edge when you win and future edge when you lose. if you try putting that on SNGwiz, it doesn't give you your future edge, so you need to make some general assumptions on how likely winning the hand will increase your edge/equity in the tournament. IMO it's rather senseless to put much emphasis on your edge on t400, since you're VERY far away from being anywhere near a relevant phase in tourney, including stack-wise. so imo you should definitely gamble it up when you're sure to have a decent +cev play to make.