If you don't have room for the bench/desk to set away from the wall, casters would be a good alternate strategy, also don't forget power strips and a Master on/off switch.
If you have room, and plan on building or repairing old gear, a separate work bench should be considered. I used the ops bench as a repair bench for several years but there was never enough room.
Work benches need to accommodate not only the unit being worked on, but the associated test gear as well, so I decided to make a second bench. The entire bench top is 4 X 8 feet, with about 28 inches of clear bench to work with.