Have you tried pulse pumping?
I do it once a week with an air pump for a 20 minute session. 5-6.5 Hg for 5 mins, 2 Hg for 30 seconds, back to 5-6.5Hg for another 5 minutes and repeat. You can do this, and probably better with the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]
Bathmate[/words]. Go from Max bearable pressure to medium light and back.
Staying hard through out session is a must too, for me at least anyway, so you could utilize milking and shakes if you want to stay away from adult entertainment. Shakes work best for me.
https://www.maleenhancementpr.com/penis-pump-routines-tips-and-techniques/).
Try SSJs after a nice pulse pumping session.
Pulse pumping with the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]
Bathmate[/words] gave me quite a bit of expansion so I hope you will experience the same.