Blade balancing help please?

[Skipper Billy]

T-Rex 450 - new carbon blades from a well known auction site.

Serious wobble on spool up. High speed vibration in the hover.

Checked balance of blades.

One is 2mm longer than the other.

The longer one is 2 grammes heavier overall.

The CofG is 3mm different blade to blade.

To balance them I have had to add 2 full turns around the blade root and 6 full turns around the same blade at the CofG. (Electrical tape)

It looks like cr*p.

I guess they are scrap??!!

Caveat Emptor!!

I guess you gets what you pays for

[Mart61]

That's a significant imbalance. Is it worth contacting the seller and asking them to swap? If they have a good feedback, they are more likely to want to swap them out than blot the copybook?

[sacko]

I guess they are scrap??!!

Sounds it