Highly doubtful, I've ran thousands of rounds already through this gun, haven't had any major issues. With Kimber magazines it works fine. I've had the gun for a little over two years now. All the springs on it has been replaced with Wilson's which is essentially from Wolff. Have also swapped out the plastic MSH with a stainless steel one also from Wilson.
I have to admit though, perhaps the Wilson magazine design may be the issue. When I was putting in the MSH from Wilson it was a few mm too tall, and I had to file it down in order for it to fit. So it is not out of the question that the specs from Kimber may not be similar to Wilson's.
Kimber mags are Checkmates. Send the Wilsons back buy more checkmates or Kimbers and move on. While I agree that a 1911 should feed reliably from any mag these days so many people, like Wilson and Kimber, treat the orginal JMB as suggestion instead of a blue print that different combinations simply do not work. In the best of all possible worlds yes they would all run but in the end that is rarely the case anymore.
1911 parts for all their claims are almost never "drop in". Does not surprise me the mainspring required a little fitting.
Wilson mags are a love hate sort of thing. Many people swear by them others not so much. I used to drink the koolaid on them but have since moved on. There are other cheaper mags that function as well or better. IMHO