Very nice adviceYes, that is the most important part is to test the carto before you put the whole thing together. You might find that the carto does not work or is not making contact with the connection point inside the AFS. So before you fill the tank with juice and before you put the whole AFS together is it good practice to put the brass part on the GG and then the Carto with a little juice in to test to make sure it works fine, then you should be good to go setting the whole thing up and putting juice inside the tank.

(as I discovered two times until now the hard way
