I wanted to install a vang on the boat
(L400) during commissioning. Sent a query to Lagoon
that forwarded the query to Selden (mast manufacturer). Selden replied negatively even stating that the warranty for the mast
and boom will be withdrawn if I will do it on my own.
The main problem seems to be the low height of the boom over cabin
top. The vang shoul make 45 deg angles with both spars and on the L400 this will be a very short one and the end on the boom will be close to the mast. Arm too short.