I know this may be a dumb questions, but does the knob work if assigned to anything else? Is your friend using the madcatz software or the DCS in game config?
We need object sizing back in the worst way.
How my group goes about it is by utilizing a modified .lua file. It puts a gray dot on the target from 3-7nm. What it does is give you the visual at a reasonable/realistic distance. Within 3nm you can see the object, outside of 7nm you wouldn't be able to see it anyway thusly the limitation. This affects both our VR and our 4k users so it was an easy vote.
I hate to say it but this topic has been beaten to death with no official response. We had object scaling at one point but it was removed with no explanation. A great number of us want it back.
CAN WE GET AN OFFICAL RESPONSE TO THIS TOPIC PLEASE.
I had a Vic20 without any flight sims for my first PC but you can bet I spent a load of hours of the good old Tandy 1000HX playing F-15 Strike Eagle, F-19, and A-10 Tank Killer.
We really need the model enlargement back. That was the fix, it worked well. Problem is that people like SharpeXB made enough noise that they took it out. As is with all things these days, the squeaky wheel gets the grease.
If you go into the "Eagle Dynamics" folder created when you installed DCS you will see "Repair DCS". Click that, let it run and see if that helps. I know that has been my solution for a number of problems.