I made my own template for this & it did have a design flaw that I had to change after the roof collapsed .. I nearly gave up on it , it was pain staking , it took hours & hours & had severe hand cramps after a few days lol , it hasn’t turned out as well as I’d hoped but I’m pleased I got it stand up , next time I think I’d use a smaller tip , this was done with a 2 but I think I need a 1 , I would like to try it again ( when my hands have recovered ) & try & get it a bit neater