Serpent HAVE made a geared diff for the S400, most of the team drivers are using it and think its great. Its adjustable by changing the thickness of oil in it (same as 1/8th OR diffs). Its only 5g heavier than the ball diff (are there light!) and the people using it much prefer it due to the reduced maintence and much more reliable tuning (its the same everytime you use it whereas with building a ball diff every 3 or 4 races its difficult to get it exactly the same every rebuild).
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Canon 40D (350D backup) - EF-S 18-55 - EF-S 17-85 - EF 100-300 - EF 50 - Canon 430 EX || Speedlite - Canon BG-E2N Grip
Adobe Photoshop CS4 Extended AX-10 Crawler - Thats all I have left!!!
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