Alain, I would just like to thank you for inventing such a great anchor.I have a 35 foot racing/cruising catamaran, a Tek 35, and a few years back, when equipping the new vessel, I ordered two 15 pound spade aluminum anchors, to keep the weight on the boat to a minimum. I put them on 20 feet of chain, and then 5/8″ line. I always dig them in using the boats backwards momentum, as I cannot generate any appreciable pull using my motor. They always catch and hold, and this is a good thing, as I am singlehanding with my 5 and 8 year old sons for my only crew. As I often like to anchor in close quarters, either with other boats or rocks nearby, a missed set with an anchor would lead at best to a serious scramble to keep out of trouble and at worst to damage! Their holding power has also been useful when a 55 foot powerboat drifted down on us, or when we sat out Hurricane Isabel I write this sitting out 25 knot winds (for a week!) in the Bahamas, the second time this winter we have had such extended times of strong wind. We have gone to help other boats who have dragged, but are secure in knowing we are staying put.