But if isn’t.

• start by putting metric units next to the SAE units in the labels
• Eventually people get used to the units and then you phase out the use of them.

All science and most of the mechanical engineering is done in metric already. If you have a car made in the last 20 years ask the fasteners are already metric. So it really isn’t that hard…

I had a friend that ran theirs though the air conditioning ducts. For mine though I ran them in the corners and under area rugs.

Maybe you could do port knocking to have the firewall open the port to that IP after you hit a series of ports in the proper sequence.