I took a heat gun to the stock cover and bent it a bit to fit over the Odyssey battery. Then I added an aluminum strap from the top frame bar down to the bolt that holds the batter cover on. That added strap really snugs the heavy battery in place.
Everything is adaptable. You'll find a solution that works for you. Don't be afraid to modify things.
I've had my Odyssey battery in there for four years and it's been drained dead a few times along the way. Still, it takes and holds a charge well and has all the cranking power anyone would ever need.
No regrets from me.
Life is a mortal adventure. Don't avoid all the risks.
2005 KLR650, ready for the world
1999 KLR650, badly in need of TLC...
1998 Honda Valkyrie Tourer
2001 DRZ400e, already broken... in