[1000mp] Rotary fan

[Tech]

After using the FTV1000 most of the summer getting sick of the out of 
balance vibration through my work desk when i am on 6M.
I have just pulled the fan and find it is the same design although miniature 
of the old oil heaters.
Same fan is used in the MKV but bolted down solid.
In the FTV1000 it is on two flimsy brackets and it vibrates.
Has anyone changed these fans and is there a better brand thanks.
failing that I will mount two 3 inch muffins instead.

Steve VK3SIX