I made this to fit my CG-5 Celestron EQ mount. This is great for smaller setups like a DSLR, a small finder/tracking scope, or just a little extra weight. This has a 20mm center hole. You will need about four bucks worth of pennies. Fully loaded it weighs 2 lb 14 oz or 1.3 Kg. You could also use Fishing weights to increase the weight.

Requirements:

3x M3 Threaded Inserts
1x M6 Threaded Inserts
3x M3 x 8mm Bolts
1x m6 x 40mm Bolt or Knob
$4.00 worth of pennies