Dear Emil,
It seems that you created a problem for yourself.I usuallly lower the mast with the V form stainless steel boom that is
provided with every Vega in the water.
If I have no help I asked the harbour people to to it . They use
their crane, which is used for lifting boats out of the water.
If you lower the mast on land while the boat is on a cradle I wonder
whether the boat might dislocate from the cradle.
Henk Jansen