Tower Hobbies P-51B Berlin Express 40" Homemade Hatch Presentation

Stock hatch got completely lost during a flight recently. From there, I ordered a 50pc 5mm×2mm circle magnets from a Chinese business online through EBAY.
Homemade hatch is a damaged Parkzone 43" Bf-109g Messerschmitt hatch glued down to a card board cut from a shipping box. The glue for the Messerschmitt hatch joining the cardboard and the 4 from the 50pc magnets sitting on board is from 5-minute epoxy.
How those two of the 50pc magnets are secured to top front of fuselage: Two grooves were formed from the Great Planes Engine Mount Dead Center Tool and Exacto knife cutting in a circular direction

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Just finished the 3rd or is it forth rebuild of Dad's Sensei. Like

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@@spartan3299 All I can say is 1st time of hatch replacing and bit of repairs have been done on plane before