Moss Motors, Ltd

I'm looking to improve the ride on my '64 TR4, which is my daily driver, and was considering the "TR4 Tube Shock Conversion" (http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=71914).  They claim that this is "the best way to improve your TR4's ride."

Does anyone have experience with this upgrade?  Is it worth doing?  What should I consider before doing it?

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--Bill

 I really believe that a lot of thought went into the suspension design. If the lever shocks have gone bad (whatever that means) or leaking, Apple Hydraulics can rebuild lever shocks and there's rebuilt ones from Moss.