That's interesting. Are you saying that because of the increased curvature on the left side? It does resemble the follower in my No 1, Mk III. I know that the mag bodies are different, they are not interchangeable between rifles, but I did not know that the followers are different. This is odd in that it came from a No 4 mag. I'll take a look at Laidler's stuff.
On the issue of the Savage mag, how would I go about reshaping it? A bit of hammering with a ball-peen?