Question is answered but I feel that more info would help to help the poster,
as I have implemented exactly the same thing in one of the implementations.
Unfortunately, there was a need for about 80 storage types, since it was a very complex
environment and with some correlations that forced us to make those as storage types
and not distinct by sections, or any other method possible in WM.
But the modification was pretty much easy:
Create a custom table with the same structure, only give it more columns, e.g. 99 or more.
Make it maintainable by SM30 for easier maintenance.
Find the occurrences of standard table and change it with custom table.
Change the code where needed to allow for searching through more than 30 records.
It is working fine for the client for more than 2 years, no problems whatsoever so don't
hesitate to do this modification.
Not only that, we have implemented custom table for allowed bin type per SUT and it is
also working perfectly. Go for it.
Hope this helps,
Regards.