I did this upgrade with the help of forum members here! its not difficult at all just buy the parts from Dan @ duckworths and ask him to send you the 2 specific bolts that fit into the bracket.

here's how I installed.

1) remove the old tailgate cable (right side), replace with new cable with metal nipple (which clips into the gas strut, make sure the nipple is the bolt that screws into the top side)
2) click the top of the gas strut (short end) to the metal nipple
3) click the lower end of the gas strut to the metal bracket
4) line up the bracket on the right upper side of the lower tailgate metal. If you see my photos I found that the best fit was a little higher up. (move the bracket around till it sits properly)
5) get a sharpie permanent markers and mark the centre of the 2 holes in the aligned bracket (1 of top and one on right side)
6) remove the bracket from the lower gas strut (to give room to drill)
7) centre punch the 2 black pen marks you made
8 ) drill a 2mm drill bit pilot hole in each (the hole on the right side will require you to lift the tailgate at 45 degress and then drill so you have the necessary access, you can put a soft towel on the bumper to avoid and metal bits damaging the paint)
9) drill a 5.5mm pilot hole after that (to expand the hole)
10) add a bit of primer or paint to both holes (let it dry)
11) clip the bracket back on to the lower gas strut
12) using the 2 x m6 land rover bolts Dan @ duckworths supplied start tightening them down (they are a perfect fit)
13) close the tailgate and test, the tailgate will drop fairly quickly from 90 degrees to 55 and then the strut dampens it to about 10 degrees where it falls a bit quicker.
14) I added a bit of wd40 to all the strut moving parts

Hope this helps!

YOUTUBE VIDEO: http://youtu.be/c-lQKgk_-JI

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Excellent how to Wiki?

Received the bits from Dan this morning.

All done, very straight forward.

just to let anyone know who's interested in ordering a kit, the brackets are currently back ordered at the factory there is no ETA date available as of yet. www.duckworthparts.co.uk
Email: danroberts@duckworthlandrover.co.uk
Tel: 01673 849873 - My Direct Line