I'm don't remember exactly where but in more than one place during the build I ran into a problem just like this one. In my case I ground off just enough material to eliminate the interference. In the case of a horizontal tail strut, in most of its life it will be loaded in compression. Break out or bearing loads in the tensile condition should be relatively small. Running even a really conservative calculation (left to the reader) the result should support the minimum condition of 1.5 times the diameter of the hole to the edge of the part (around the entire periphery). If in any particular case there isn't a 1.5 diameter available, check out: https://www.machinedesign.com/fasten...tearout-stress for the formulas of interest to see if the particular thicknesses of a lift strut and its assumed load will be sufficient. Check out https://www.azom.com/article.aspx?ArticleID=6742 for the values commonly used in design calculations for 4130 material.