CSA has been enforcing rules on overweight/oversized lugagge quite seriously for the last few weeks. Especially in Prague I see big discussions at check-in. I also saw some people buying extra kilos in Munich fairly recently. Of course they do everything to generate some extra revenue currently - so I do not give you a big chance. But mamaybe they do not have their own personnel in TLV and then you might slip through. I wouldnt give you a lot of chance on the Swiss side.