I might add that a ESV is a MUST! I've got a flying buddy thats got alot of $$ in all of his planes and no ESV. We joke about it all the time about how he can afford to have a thousands wrapped up in his planes but cannot afford a $10 ESV.
If I didnt have one I think I would go bannanas! Everyone has thier own budget to spend on this hobby and I respect that. BUT, if you had an ESV, this would not even be an issue
Its probably one of the most important items I keep in my flight box.
Just my $.02