I’m looking to build a driving iron out of a Callaway Apex CF16 3 iron that I bought from a guy. I’ve had the loft bent to 17* but I’m just not in love with the shaft that he put in it (UST Proforce V2 5F3 (R)). I really like the Maltby Pro Series (S) shaft in my KE4 Tour Hybrid that came with the pack deal. My question is, would that be a good shaft for a driving iron? Should I consider an Iron shaft instead? I’m looking for something to give that low boring trajectory that driving irons are known for.