Talk:ZGMF-X12A Testament Gundam

Was the ZGMF-X56S Impulse Gundam developed from the ZGMF-X12A Testament Gundam?
The Testament was the first ZAFT Gundam with Variable Phase Shift armor and hardpoints for Striker Packs. The Impulse uses Variable Phase Shift armor and uses hardpoints for Silhouette Packs. Could the Impulse be based on the Testament and GAT-X105 Strike Gundam.