The problem is so one will do just as you ask... but even if they come back in a year and say all is well how many gallons are they actually putting through it.
Many people can get away with a purchase like this because they go to the field put on a 10 min flight here and there and spend most of the day chatting. I am not saying there is anything wrong with that.. its not like I havent spent more time flying my mouth than flying

on a day or two but you really want some gallons through it to see how it holds up.
Now if you have a guy who flys a lot then you can get better feedback... I want to hear about it after 5, 10 , 15 gallons not the first gallon when the engine hasn't been abused yet