That sounds unsafe. If I miss the subdermal layer, I’ll punch right through the transverse ligament underneath. There ain’t no muscle there.
I could. The skin looks a bit less taut further back. But then I won’t be able to drop the chip where I want - which is all the way forward. I want it there so it’s as close to the ground as possible, but also so it’s well protected in the deep recess between the phalangeal bones. Also, I don’t want it to end up between the metatarsal heads for the same safety reason.