Yes,, the jack was a tad on the pricey side even though it was purchased used. I too researched and found the majority thought J&S are one of the best and made in WI, I love there cheese.. Never having lifted 800+ lb of bike before I didn't want to be discouraged with a pile of plastic carnage on the floor if my project went a little sideways so I am trying to start with a leg up so to speak.
I searched a little yesterday on lift points for the GL1500, seems a lot of people are calming lifting on the exhaust has had no ill affect for them. Maybe Id be fine with that, but my luck normally trends in the direction of an expensive mistake and I spend the following week or two kicking my self.
I did call J&S, pleasant people, but I fear the person I was talking to was younger than my bike and could not offer much in first hand knowledge. I took your advice put the rear plate on the center stand mount and the front under the motor. She is a little nose heavy, not exactly centered to my liking but seems to be stable enough when lifted all the way up, I just won't be sitting on the fender like there marketing images clam though.
Thanks for the measurement, this jack is 17" wide end to end.