planning to pound in 4x4 posts into a mud bottom pond for the first rail in a winch park. from past experience i find that as you pound on the top of the post it starts to splinter making for a pain when it comes to assembling the sliding structure. i found this post driving cap http://dockmaker.com/Merchant2/merch...Category_Code=
but didn't really want to drop the $40 and have to wait for it to be shipped here. any suggestions or advice with this project?