I ordered this WDH (weight distributing hitch) today. I was going to use the WDH from my Surveyor travel trailer...but it was just too heavy (weight rating). If you're using a WDH that is far above the tongue weights of your trailer it will make things ride like a log truck and in my opinion has the potential to cause safety issues.
Anyway...I was pleased to find this. Your Volvo may benefit from one of these.
https://www.ebay.com/itm/Husky-32215...9d03%7Ciid%3A1