Take a look at http://www.ezjax.com/ezjax/ the only time they are
deployed is when dropping the sail or holding in a reefed (and
unbunted) sail.
I have mine stored on the boom when raising. I swear by my
('home-made') ezjax equivalents. Once I put in the second and third
reefs I will tie in the reef lines; but, for a single reef I just lay
it in the ezjax.

.com,
wrote:

I get annoyed with my lazy jacks because the mainsail battens catch on
'em Every time I hoist the main.
While I appreciate the value of lazy jacks, the "damnit!" factor is
definitely gaining. I think they are going to get taken off this
spring...

Gary
http://home.ca.inter.net/~gkmd/sail/CarpeDiem.htm