Sorry before anyone corrects me wd40 is
51% Stoddard solvent (i.e., mineral spirits: primarily hexane, somewhat similar to kerosene)
25% Liquefied petroleum gas (presumably as a propellant; carbon dioxide is now used instead to reduce WD-40's considerable flammability)
15+% Mineral oil (light lubricating oil)
10-% Inert ingredients
but still not great at loosening seized joints
M
Went to the Zu today to pick up my replacement mast for the one that was stuck, and the guys there said that Severne themselves said that the 2 year guarantee holds... EVEN IF ITS STUCK!!!!
Never the less I will be making sure the joint is clear from now on.
I did try 2 tonne chain block. Doesn't work. Still stack.
I gave up and carry on the roof rack as old good single piece.
Shoud I go for replacement too ?? 
to the SuperAuto Cheap ..
for a bigger chain block of course 
but seriously I have also hydraulic ram that for sure could do the job but there is problems with applying such force exactly in long axis.
Matter is waiting for some inventor to come with sort of self centering rings or similar device that could grab boom safely and do not slide when pulled with extreme force.
or somebody know how to create such thing to grab the mast ( maybe something similar to boom piece ?)
It might seem a little obvious but I hope everyone completes step 1 before they try to separate their masts.
Step 1 : check it is a two piece mast and not a single piece.
. The more people on each side the funnier.
