I managed to build a rack over two weekends in between the showers of rain that we have been experiencing. I concreted two 50 mm posts into the ground and bolted on two crossbars for extra strength. I had always owned a pair of Aquaracks, so I thought I would use these to mount at least one kayak and luckily I picked up another pair of Aquaracks second hand on Gumtree in Brisbane. I bolted the aquaracks to the uprights and my new Kayak rack was finished.
I must say it is a whole lot better having my kayaks stored individually now as up until now they were all leaning against each other on their edges, locked up. So if I wanted to use the kayak at the front I had to move two other kayaks before hand. This way it will save time when I'm on the go for a planned kayak trip and also protecting them a bit better stored apart rather than all stacked against one another.
If you able to weld or have access to a pipe bender you could easily make a kayak rack such as this on the cheap rather than buying the dearer Aquaracks as I have done.
Also as some of you may have seen on the kayak forums last week I sold my 2008 Tarpon 100 . I did this to upgrade to the same kayak in the latest 2011/2012 model. The hatches, the seating and the side trax accessory rails are a huge benefit over the earlier model. I am fitting that out at the moment with Scotty Rod Holders, Flush Mount Rod Holders, Scotty Anchor Lock and some ram balls. Pictures will be on the site soon.