TrueGolfFit app also recommended this shaft for me as well. 95-100 mph swing speed, moderate tempo, slight upward angle of attack. I was then fitted with this shaft (60S) during a TM Stealth Driver session. This is a stock option with the Stealth. However, I will not pay $600 for a Gen1 composite face, maybe Gen2. Still, I loved the feel of the Ascent Red shaft. Behaved very stable when I tried to jump on a few drives and had a nice low feeling kick. Aldila aftermarket version is about $250 on ebay, but I found some brand new (pulled from TM Stealth heads) for $70 w/ TM adapter, on ebay. Per Alidila support, the TM version is identical to the aftermarket shaft, expect for the paint scheme. Whether these are repurposed (repainted) Fubuki V shafts, I can't say, but for $70, it's a deal.