According to TURTLE :
So, I don't think the OP would gain anything useful by extending the
circuit with aluminum.

This is Turtle.

It seem here you feel like just talking about something that does not make any difference.

It does make a difference:

- It'll be harder to accomplish (stuffing the thicker/stiffer
wire into the box).
- It increases the number of aluminum connections in the circuit and
attendant "be very careful" (ie: nicks, kinks) requirements.
Which many would prefer to avoid.
- Probably be harder to find the wire, and may be more expensive
(if you have to buy predetermined lengths from an electrical
supplier rather than a generic DIY outlet).

If he has aluminum wire already and he can get the splices into the box,
then, sure, fine, go ahead.

But I _personally_ wouldn't spending _more_ effort (and possibly money)
implementing an inferior solution. A superior result with _less_ effort
(especially when there's minimal cost disadvantage at _best_) sounds like
a better plan to me.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.