All you can do is try it, if your BP utilises the shelf then great, if not no harm donePictures would be great once you've completed the tank!
Also, I feed both of my BP's in their enclosure. One had never struck at me and the other has only struck defensively because of my own stupidity in hesitating when going to pick her up (and she is young). People with larger collection will tend to feed in the enclosure also as they wouldn't have time to move all of the snakes out, feed them and put them back.
I have always thought that feeding in the enclosure is the best way personally. If you shouldn't handle after feeding for a 24-48hr time period in case of a regurge I can't see handling immediately after feeding to put back in an enclosure a good idea.
I'm not saying taking them out and feeding elsewhere is wrong. Not at all! Everyone does things differently and all that matters is that whatever you do works for you![]()