A slab seemed like a good idea after all the tab failures, so I picked this heated gravel slab and broke it too.
The first flute went all the way but developed some waves that I thought for sure would cause another cut through at one of the low spots. I clamped it in the jig and Bam! I was so happy it went all the way to the tip and looked smooth. The clamp was holding the broken ear in place and I couldn't tell it was broke until I unclamped it and the ear hit the floor.