Aluminum footings on the business end of carbon arrows have proven to significantly increase strength as well as add weight when fine tuning arrows.
I have found that a weak spot is the threaded shank of the broadhead adapter.
Jesse Peltan suggested extending the footing to cover the pivoting point of the weak spot. I thought that was a clever idea and below is an attempt to do just that.
It seems to also serve as a much more seamless transition which should help with penetration in animals and targets.
This is a picture of the footing extended 1/2" beyond the 100 gr. brass insert.
This is a picture of the 200 gr. adapter that extends 1/2" behind the broadhead.
This picture shows the point at which the threaded shank hits the first thread of the insert.
This is when the adapter is screwed in tight right as it reaches the back of broadhead.
Close up shot. The silver part is the tapered edge of the footing. The adapter is completely covered.