I was able to *repeatedly* develop 14x17 ADOX CHS 100 film in a Jobo 2850 combo. In the endless debate re: developing ULF film in 2800 drums, i.e., "I get bands" - "I don't" - "I get bands" - "I don't" ... I personally ended up in the "I don't" category :-)
It works just fine for me then with ADOX film, that is. Maybe with some other film the raised ridges do wreck the development, who knows.
But as I have also a 3063 I am certainly interested in a 14x17 insert - better safe than sorry.