I will also say the same.

I put a Harry Higley brass "heavy hub" on a .46 powered pattern trainer for CG purposes. I hid it under a 2 3/4 " diameter spinner. Increased smoothness and reliability of the engine at idle was noticeable. I noticed no difference in throttle response. Hand starting was a snap.

Some old hands predicted dire consequences would follow. Warnings of "increased gyroscopic precession", stressing the front ball race beyond its rating.

I never noticed any issue. Engine was fine.