Been reserching pack construction in the RC forums and ran across this, though it was worth passing on.
http://www.modelelectronicscorp.com/browse_product.php?pid=29
Repair capability is not the only advantage offered by this system, Since the cells are placed 'end to end' (touch each other directly), resistance is lower than either soldered, or spot welded packs, resulting in more power reaching your motor, to do work!
http://www.modelelectronicscorp.com/browse_product.php?pid=29