I would appreciate any suggestions on how I should join the pieces of the entryway bench I would like to make. The seat will be 4 foot long and 18" wide. I am concerned about what joinery I should use. The middle pieces would be 2 inches wide x 3/4" thick. I recently purchased a plate joiner, but have yet to learn how to use it. Can it be used on pieces this narrow? I am very concerned about the strength of the bench top. The photo isn't in scale, but I hope you can see what I hope to accomplish. Thanks in advance for any advice…..