My trailer has one built in. It extends about 10 ft and I launched my 25
(2'6" draft with board up) before the truck wheels hit the top of the ramp.
Some of the guys at my dinghy club have the bolt on extensions. They need
them cause they are too lazy raise the daggerboards on c&C SR21's all the
way up. The extensions seem to work all right though. They bolt on to the
trailer tongue.

david

"Dan Borden" wrote in message
.. .
I have a 21' fixed keel and am new to this. Launching is extremely
difficult
and have looked at different solutions including using a chain. I saw on
the
Potter site that a few of their customers have suggested using Extend a
Hitch. Has anyone used this? (I'm waiting for my request to join their
forum
to be approved to ask questions there.) I checked out the web site,
www.extendahitch.com and it looks pretty simple. Any other suggestions
anyone have? I have to put my tires in the water and sometimes I still
can't
launch, especially at shallow ramps.