I have a Delta miter box and heavy duty cart with built in lighting for sale. No longer need so - time for someone else to use it. The miter box (some call these "chop saw's" but that's for butchers and I'm an artisan with new equipment.
The cart and work station I made. The cart is extreme weight capable with hard rubber casters that include locking brakes. These carts (I have others) were made for a Delco Factory in Oak Creek to carry 55gal drums of fluid behind a factory jeep. The extension arms are for holding trim solid when cutting miters. Miter box: seen lots of use many years back but still cuts pretty well.