Wobbled most of the way up but nice high altitude on the Estes D12-3. Did its customary end-for-end tumble and hit the ground hard enough to break yet another CD. Also melted the prism wrap around the tube again. Closer examination revealed tube was almost burned through from ejection charge which also caused severe smoke clouding to top disc as well. Glad this motor wasn't in one of my regular rockets as I may need to replace BT as well.