Yeah, I kinda like Benno as a character, but here, I always feels his share is way too much. Sure, he negotiated a better deal, but material cost ? Frida provided most of the thread she used and the pin is just some wood. Doubt that's worth 20% of the finished product, assuming his commission is yet again 30%
Even then, taking a 30% com feels a bit too high for his involvement here.