I did up a simple rig to mount my ball head so that it will stand on the table and hence use it for macro shots. Here is what it looks like:
Basically, here is what I did:
1. Bought two 1.5 inch long 3/8 inch screws with bolts from a screw specialist shop in the French Road area. The lady says she selling such small quantities to individuals as a service. Total cost $1.
2. Bought a wooden chopper block from NTUC Fairprice - $7.50.
3. Bought 4 rubber leg stubs from a dollar shop - $1 each.
4. Bought a 3/8inch drill bit from a hardware shop at Balestier Road - $3.50. This and the screws are the hardest components to find.
5. Bought a set of 3 counter-sunk drill bits from a dollar shop - $5.50. Also pretty lucky to find it.
6. Drill the main hole.
7. Drill counter-sunk hole so that at the end, my screw + bolt will cause enough protrusion on the other side of the chopping block to engage the ballhead's female thread. The screw by itself is too long.
And that's it!
Another shot of the rig (using my phone):
Tested it out with my sgcamerastore Beginners Studio Kit (a softbox + two standing lights). Here is one of the shots:
I hope some one will find this info useful.