Russian Tea Cake - Different, interesting, but not entirely successful...

This cake had a lot going for it in terms of ingredients and make-up - it had cake in many many layers, custard and somewhat bizarrely, TEA.  The recipe said rooibos, but on the basis I don't like it I substituted Earl Grey (which I do like, I like very much!).  So, the idea was simple, bake the cakes (I managed to do two batches of four at a time in the oven, rather than the two at a time suggested by the recipe), make the tea flavoured custard filling, and sandwich the lot together.  So I did this, it looks pretty impressive in a kind of leaning tower of cake kind of way.  But, I have to say it was overall disappointing - the cake layers were dry, it was a nightmare to cut, and the custard, which actually tasted really nice, was like rubber.  For future reference I think I will cook the cakes for less time, consider soaking them with some of the tea, and omit the additional cornflour from the custard mixture, as I think this will help it all to 'sog' together a bit better.  This version didn't even make it to being the next day's dessert with custard it was so bad!  I knew I should have stuck to my original plan and made the Nigella Autumn Cake!