We don't sell the multi-tool anymore, it was a nice pocket tool, but since people expected it to be a bench tool we shelved it until we could produce a more solid model (though solid equals to heavy/too long to be a take along unless it's made from precious metals).

The slipping problems a lot of people encounter are caused a lot of times by mismatching chainwhip with cog. Most chainwhips are designed for multi-speed 3/32 chains, and won't fit over 1/8 cogs completely - conversely 1/8 whips are loose and provide a little too much play when used on a 3/32 cog. An inexpensive bar whip with the right chain will work a lot better than the most expensive whip with the wrong chain.

rgds
will@nycbikes.com