I kept cracking the lower tray on my mini T4. Made this landing skid to help. Much faster to change these out than the lower tray. Adds a bit of cushion too when landing. Still a bit of work in progress. I ran this through a simple FEA stress analysis to get a fairly strong but flexible design. Skid should fold up absorbing most of the impact as it breaks saving arm, tray, and body. Now testing the real world application. Made 2 flights this last weekend with a couple of rough touchdowns. No broken parts yet.Has to be made with support on its side (sorry). I used a concentric infill pattern for top and bottom layers to add a "grain direction" to the parts PLA 40% infill (45/-45) Small cable ties to hold them on.