Cooling Fan 1964 MK2

Hi All,
When reassembling the engine I noticed a crack in one of the old metal fan blades. Decided to purchase a new fan from SNG UK, looks like a good solid built product.

My Question:
The old fan had the usual two balance weights. The WSM shows a method for balancing the fan, however this is not practical at my home workshop. Is it important to balance, or should I just reattach the new fan.

Any thoughts