Updated: 1/7/24
Changed location and size/angle of the dovetails for strength and added an angle brace for the top right corner. Just insert the brace into the vertical piece first then slide it and the upper piece into their dovetails. I put a drop of super glue on all the dove tail joints and let dry before assembly onto A1 Mini. Also redid the rear z axis support and added a gantry clamp to hold it in place. It is intentionally a tight fit. Uses 4 m3-6 or larger screws to hold clamp.
Here is a 3 piece A1 mini ams lite top mount. It requires no hardware and is split with dovetail connections. The part replaces the top cover and inner white plastic spacer on the top of the z rod tower. I used 3 m3-8 screws to replace the original screws that hold the white spacer. I designed the top bar to fit the A1 Ams lite top mount by bambu labs AMS lite Top Mount for A1 by Bambu Lab - MakerWorld . I put a piece of foam tape on the bottom of the leg to help it grip. I recalibrated after installation and I see no difference in print quality. I recommend printing this out of PETG or harder material. The original full size model stl is included for anyone that wants to split it up differently or use different connectors. Now includes a Z-Axis stiffener bracket that was inspired by the same mount created by Bambu Labs. It attaches to the rear spool holder bracket and requires no hardware. It has a replacement bracket on it for the rear spool holder as well.