I knew about these offset 50c machines, but never owned one. I have an escalator for one like fish mouth, but with coin entry attached. Did not know they had a deeper belly. So I may not be able to use mine, but will try on an earlier machine like a Bursting Cherry. Interesting as my jackpot has no locking bar, which initially I thought maybe missing, but wondered if the slides hold back the jackpot arm only releasing the jackpot when the top slide goes. I have a mech with a bar attached to the to slide maybe used for this purpose.
I have some non offset Hi Tops on 1D, suspect they were modified back in the day