We cruised with a spade anchor on our PDQ36 cat for more than a year. We had the aluminum one too. here’s what we thought. The spade is a GREAT anchor ! It held like a rock in ALL conditions and all bottoms. The aluminum was good because we could easily raise it even when it was really buried and we could set it by hand when we dove on it if necessaryThey are worth the investment. It’s amazing to watch them set in clear water, you see why they work so well !
Location : Ft. Lauderdale Cruised on a friends boat and anchored with a Spade (Alu) .I drove the boat and set the anchor in a very familiar spot.(Half sand, half mud)The spade set right away, and I gradually went full power in reverse and held the power at full for a little, just to "check" the Spade out. I was impressed, it did not budge.