So since my last post on this I emailed Slideanchor and told them of my issues with their large box anchor not working well with my boat on windy days. The OWNER of the company called me late that same day (2 days ago) and provided me with some very important information about anchors in general and also some info specific to his anchor (he owns the company....he designed the anchor himself).
First, he insists that my (his) anchor should indeed EASILY work for my boat even stating that it should hold mine and 4 other boats tied up to me, especially the size anchor that I have (their large one).
Second, it was found that I was using it incorrectly. With a traditional anchor you generally let as much anchor line out as possible so as to allow the anchor to dig in vs. having the boat close to being directly about it which would keep dislodging the anchor. His achor is designed to be used as a 2:1 ratio of anchor line to water depth: If you're in 30 feet of water then you want to use 60 feet of anchor line....not all 100 like I was doing.
Third, he stated you want to use TWISTED nylon anchor line, not braided like I have been using. Reason being is that braided line doesn't have the 'elastic give' that twisted nylon has. So when my boat is being pulled against the anchor due to winds, there is almost zero give in the anchor line thus it's 'snapping' the anchor and making it move along the bottom of the lake.
So basically I have been doing everything wrong; wrong line and incorrect length of line used. He also stated not to throw the anchor out while the boat is still moving (which I don't do). He stated to just drop it over (with the correct amount of line out) and the anchor is designed to roll over into the correct position and fasten itself to the bottom correctly.
Again, this is for the box anchor, not a traditional anchor (except for using the twisted nylon line which he states you should use with any anchor).
I'm not trying to insult anyone's intellegence by posting this. Perhaps most already know this but I have been involved with boats and lived on lakes almost my entire life and I didn't know some of the things he told me so I thought I'd share.
He ended with saying that he wanted me to save his phone number in my contact list on my cell phone and that if by this summer when I use my anchor again (correctly and with the correct anchor line) and the anchor still doesn't hold, even on windy days with my bimini fully deployed, to call him and he would buy the anchor back from me (and I have used it for 2 years now). That's backing your product.