>>5765100>swords from Koto's no-scale TSFI would really REALLY start with something simpler if I were you. Because of the shape of that sword, you are going to waste a lot of silicone on your first couple of failed attempts (speaking from personal experience here) and silicone ain't cheap.
Also, mold making is Serious Business (TM), it is not a matter of simply pushing master into clay. I spent like 2 hours sculpting the parting line in my last mold
>>5762843.