Hello Campingfreaks, today the first leak test was due for my hobby 450UF. I had informed myself in the search radio before what the number costs so. Just looked in and read there something of approx. 35 Euro. Now comes the absolute hammer, this procedure with which I was running in about two minutes and cost 62 Euro. Then I asked if I can take the measuring device with me now. That is the absolute scorn what these hobby contract dealers for a cure Does anyone of you have a newer date hobby with current leak check and what did you pay for it? To get this 5 year warranty you need a dealer stamp or there are alternatives to it? MfG. Biker