For some reason my mixture was too runny :/ or at least that is what it felt like. The temperature on recipe is also way too hot for my oven. The first batch were too burned and I threw them away, Some of them I just spooned on baking tray (suggested by a lovely lady on a forum I visit). They tasted lovely when filled with lemon whipped cream.
(I couldnt make her kumquat filling because there are no kumquats in shops here)
Recipe for lemon whipped cream
250ml whipping cream
3 tablespoons sugar (I used caster and ground it with pestle and mortar)
3 teaspoons lemon juice
2 teaspoons lemon rind
put it all in bowl and whisk until it forms peaks.
I will try this again and hopefully my piping gets better.