Can you cut material I supply?
The short answer is “yes.” The longer answer takes into account cost of materials vs cost of setup times.
Cost of Materials vs Cost of Setup times
If you have something pre-fabricated (such as an enclosure like these), it makes perfect sense for us to cut assemblies you provide.
If you need several pieces all out of the same material, it can be much more cost-effective for us to cut out of a single sheet of material we supply rather than out of multiple pieces you supply. The setup charges for each new piece of material placed on the table can exceed the cost of the material. This presumes, of course, your material isn’t something particularly exotic/expensive like carbon fiber, fiberglass, laminates, or pre-formed metal pieces.