Your door latch kit arrived a couple of days ago. Today I installed the kit following the video instructions on my laptop. Our ’75 Boler now has a functional door latch and lock! The instructions and video were very clear. The new mechanism was remarkably easy to install. Earlier I had obtained the crank mechanisms for the larger windows. With a little elbow grease, oil and the new mechanism, the windows are working like new. We are very glad that we discovered your business. T&K