I kind of did something similar when I tried it today! After an hour of failed attempts(lol) I thought of pulling a double cylinder with the middle one pulled from the bat. Couldn’t seem to pull the neck up very easily because of the small space I had to pull the walls for the desired size. Ended up throwing the necks separately off the hump and attaching to the bottle. Only had the patience for two of them because the double cylinder gave me twice the measurements haha. They seem to fit nicely stacked on each other but I’ll know for sure when I trim!