Peninsula otr microwave installation

Question

Hello I see you have answered some questions concerning this topic. I have a peninsula cabinet above my range with no wall (containing studs) behind the range. I am asking to see if it would be alright to mount the microwave here even though it says not too in the instructions. I have reinforced the bracket location with 1x4 boards anchoring them to the other cabinets with liquid nails and 7/8" drywall screws I would also mount the 3 top screws into the 1" fiber board cabinet above. I've checked the mounting of the cabinet up in the attic and the whole cabinet is supported by 2 2x4 beams connected to the roofing structure of the house. Do you think this would be a safe configuration and would it pass inspections when I sell the house eventually? The unit weighs 62 lbs. Thanks, Ethan