The motor drive on the Tesla electric caliper fouls the shock spring when you try to mount it in the front position . The mount extension for the manual Emergency brake cable on the original caliper clears the spring so the whole thing is fully reversible - no caliper trimming required. With the two sets of ears already on the Pantera mounting case it is a very simple change.
The Tesla electric caliper is not modulating - its either full on or off. I know some work is being done to see if it can be operated as a modulating caliper but no word on that as yet. Even if that was possible , the entire brake arrangement for the car would have to be modified, both front and back, to make this work as the primary caliper. I wouldn't do it.
As it is this is, it is a relatively simple , fully reversible modification that delivers outstanding emergency brake service . And it gets rid of the inside handbrake lever.
Hope this helps ?