Does anyone have a picture of a Merlin cover side anchor? ie. an anchor that would be used to secure a cover inside a cave. It has been described to me as a two piece anchor. One piece goes into the rock and the other pieces threads in in winter to secure the cover. I have a sample of one from Loop-Loc that a dealer left with me and the threaded part you see in the summer is only 3/8" dia. ... but I decided to go with Merlin and the dealer has only described it to me... two piece also, but he says the threaded part is 1/2" instead... I'd love to see a picture of one, if anyone has a Merlin cover with one of these side wall anchors. Thanks!