I have been looking for this post! I just want you to know that I fashioned my Hoagie hog’s tub just like your picture and he has eaten for me 3 weeks in a row now! He is the sporadic problem 2 year old feeder that I have been fussing about!
Thank you so much for this idea/pic! I am ecstatic!!! 
I’m so happy to hear the tub worked out! They really do like as much cover as you can jam in there sometimes. Hopefully Hoagie keeps on eating!
Thank you! And I forgot to mention that he is a lot more relaxed as well……. I wonder if the same thing would work with a rosy boa?
I don’t think it would hurt to try!
I believe I will………
Best of luck, I hope you have similar success. 
Aspen bedding will do the job well.