Anyone finding success with the new carbide-tipped bits for end-grain Ipe?

I have been chewing through standard HSS countersink bits like candy on this current 800sqft Ipe job in South Florida. The density here is brutal, and by mid-afternoon, the heat buildup is turning my bits into useless nubs after maybe fifty holes. I just picked up the new carbide-tipped tapered bits from Carbide Processors, and so far, they are holding an edge three times longer. They cost around $45 a pop, which feels steep, but if they save me from constant sharpening or mid-day hardware store runs, it pays for itself. Is anyone else using these specific bits, or have you found a better setup for end-grain drilling without blowing out the wood? I am tired of wasting time on bit swaps while the sun is beating down on the deck.