Home made chain harrows

[jokadoka]

I'm looking for ideas for home made chain harrows?!
Would have to be used behind a Defender 90, but am only talking a 2 acre field, any ideas much appreciated!

 

[Slightly Foxed]

The only thing I can think of is weighted chain link fence but I don't think it would make much of an impression and after all that fiddling about probably wouldn't be much cheaper than this http://cgi.ebay.co.uk/4ft-(1.2m)-Qu...895939&cguid=0f82482b12a0a0a9f553d973ff799f2e