They showed a Neu 1521 in stock last Thurs., so I ordered it. I have e-mailed them multiple times asking to make sure it is the 5mm shaft and not the 8. I have not received a response. I know some of you are in the boating big time (i.e. JFruge), so I ask you, is this normal? Do they take a week to respond? I just don't want the wrong motor to show up on my doorstep.