Hi skrez,

The age of the kit will not effect the quality of the wood if it has been stored properly and not subject to insect attack.

Assuming all wood in the kit is straight, not moldy or eaten what is important remains the same. Check that the wood is sufficiently, light, strong, dense enough for its' intended purpose.

The bad news is that 20 years ago there was a significant shortage of balsa on the world market and many kits suffered from poor quality wood. However if it is a thirty plus year old Kiel Kraft Spectre CL model I'm most interrested.

Cheers,

Colin