Re: Atlas mount: good and bad!
The largest drum that I have a new Atlas mount on is my 1968 Keystone 3 ply 9"x13" tom and it works great. I also have a new Atlas mount on the 8"x12" tom on the same kit.
I have also installed one on the 8"x12" tom on my 65 Slingerland kit.
I can't see why you are having trouble with your 10"x14"?
How was it mounted before? Did it have an old style shell mount?
I kind of like old drums:)