Relatively Successful Entremet

I made this cake for my dad’s birthday, from a recipe in one of my cookbooks from The Great British Bake Off . The layers, from bottom to top, are almond sponge, lemon curd, honey custard, and blackberry gelée. It all tasted good, but I think I put too much gelatin in the custard and the gelée because they were a little rubbery. The recipe was in leaf gelatin and I only have powdered gelatin. Also, the lemon curd wasn’t set enough, so it squooshed out a bit when the cake was cut and later in the refrigerator the top half slide off of the bottom half.