|
i agree with No Misses reasoning. if your computer fails, then you go up whether you have SPG or not. if you pay attention to your tank pressure often, then you'd know how much air (approximately) you have if your DC dies. if you have a back up SPG then you can rely on your buddy computer if you had the same profile. some people would say - never rely on anyone's computer but yourown. the bottom line - SPG is a good thing to have.
|