A simple and inexpensive bike repair stand for the bench-top. It's not quite as sturdy as the commercial floor-standing models but it works really well and you can spend the money you save on that Campy derailleur set you've always wanted.
Step 1: Cut PVC parts to length
Parts List (PVC is 1 1/4" schedule 40):
(2) 90 degree elbows
(2) 45 degree elbows
(4) Splices - 2"
(1) Lower upright - 7 1/2"
(1) Upper - 9 1/2"
(1) Horizontal extension - 4 1/4"
(2) Utility hinges - 1"
(2) Galvanized conduit clamps - 1 1/2"
Foam pipe wrap
Step 2: Cut the Tee for the clamp
I used a band saw to cut in half the PVC tee used to make the clamp. The cut needs to be pretty straight in order for the clamp to hinge properly.
Step 3: Assemble
Dry assemble all the PVC parts and mark them with a Sharpie for proper alignment when you're ready for final assembly. Glue all the pvc joints. You might want to take the extra step of cleaning all joints with PVC cleaner. You don't want your stand falling apart and your bike crashing to the floor.
Install the hinges and clasp on the tee you cut in half to finish the clamp assembly.
Step 4: Attach to the bench top
Position the front legs of the stand near the front edge of the bench and use the 1 1/2" conduit clamps to hold the back of the stand securely to the bench.
Step 5: Use it
Wrap a 4" piece of foam pipe wrap around the seat post of your bike to protect it. Open the clamp and lift the bike so the seat post is inside the open clamp. Close the clamp and secure the clasp. Work on your bike.