This thread is old but I was struggling with a similar situation (I play bumper jumper flipped, use to play bumper jumper tactical flipped so I got to show respect to the bumper jumper tactical players)- and I came across this thread so others will too. If you're one reply : )
Open console by clicking accent mark on your keyboard and COPY AND PASTE THESE (starting at the first bind lol)-
BUMPER JUMPER TACTICAL NON FLIPPED- bind BUTTON_A "+smoke"; bind BUTTON_LSHLDR "+gostand"; bind BUTTON_B "+melee"; bind BUTTON_RSTICK "+stance"
BUMPER JUMPER TACTICAL FLIPPED- bind BUTTON_A "+smoke"; bind BUTTON_LTRIG "+gostand"; bind BUTTON_B "+melee"; bind BUTTON_RSTICK "+stance"; bind BUTTON_LSHLDR "+speed_throw"; bind BUTTON_RSHLDR "+attack"; bind BUTTON_RTRIG "+frag"
BUMPER JUMPER NONFLIPPED- bind BUTTON_A "+smoke"; bind BUTTON_LSHLDR "+gostand"
ME BUMPER JUMPER FLIPPED- bind BUTTON_A "+smoke"; bind BUTTON_LTRIG "+gostand"; bind BUTTON_LSHLDR "+speed_throw"; bind BUTTON_RSHLDR "+attack"; bind BUTTON_RTRIG "+frag"
Hope this helps anyone. I made sure all of these commands are working fine. Share it around if anyone else needs help.