[A/S] Hensley emergency part kit

[asdf1009@xxxxxxx]

I was thinking about how easy it would be to lose some of the Hensley hitch 
parts - especially the OCL safety keys. Hensley has an emergency kit fo 
$29.95 that contains all the small parts that one could lose
 
(see http://www.hensleymfg.com/search_results.asp?txtsearchParamTxt=&txtsearchParamCat=ALL&txtsearchParamType=ALL&txtsearchParamMan=ALL&txtsearchParamVen=ALL&txtFromSearch=fromSearch&btnSearch.x=10&btnSearch.y=11 ).

What do you Hensley onwer's think? Is it worth the investment.. or have 
you found replacements/substitutions that would work in a pinch (esp. 
the OCL safety keys)?

Also, does anyone have any experience with the tongue-twister (same web 
page)?

Thanks - John