Hey, I'm not trying to knock you here, but trying to help. Your "ton" of research clearly wasn't enough since you were feeding prey smaller than BPs eat out of the egg.
Between the two other members (both of whom are fantastic, knowledgeable keepers) trying to help you, and now myself, there is nearly 50 years of experience with many, many snakes of multiple species telling you a seperate feeding tub is a bad idea.
A seperate feeding tub is old school and proven counter productive over time.
1) this will increase your chance of rhe snake refusing the meal since you have to move the snake before feeding and moving = stress
2) this will increase your chance of the snake regurgitating it's prey since, now the snake has to be moved AGAIN. And moving = stress.
3) this will drastically increase your chances of being bitten since the snake will remain in feed mode after eating.
Again, not trying to knock you, but trying to help.