what they are talking about...
the other day I go to a parts store...
and I look around... couldn't find the tool I needed... I asked them if they had those spilless funnel's used to help burp the cooling system...
the guy behind the counter said... "oh those machines that uses a vacuum to do the cooling system? We don't have those, it's expensive"...
I just walked out... they are useless... didn't look like they had it anyways.