I am sure that I am not the first to make this, but I love my benches. It involves a little metal working, but well worth it. Use a pallet rack! They come in all different types of sizes.
Cut down the two uprights to the height you want. You will need to re weld the braces on the sides. You will also need to re weld the feet to best fit your needs. I moved the feet in so I wouldn't trip over them.
Take an additional brace and weld it at the top of your cut so this will make a surface for the top to attach to. Use the standard horizontals for cross members, with a pair at the top and a pair at the bottom for extra support and extra storage space. The frame is solid and can hold over 5000 pounds.
The weak link is the top. I used McMaster and got a maple top. ( page
1536-1537 ) It comes from a cutting board manufacturer. McMaster has all types, some better suited for your needs. Order the top to be larger then the frame so you have room to work without hitting the legs.
I also found that the 90 degree where the upright and horizontal meet, makes a good spot to mount a vise.
The frame only costs around $200 plus your time. The top is up to you. Let me know if you want pics.
Regards,
Jason