[Merlin]

This story seems to be a very rough missinterpretation of the document. I assume Strübing was commanding the Hitler youth troops, which supported the Flak unit around Hamburg and one of these batteries from Bergedorf shot down the Lancaster.

The facts:
At Buchen - which should read Büchen (located east of Hamburg) - the only military installations during the war were two Luftwaffe depots for ammunition and petrol. There was no kind of a “Me 262 training unit” or landing ground.

The distance from Büchen to Kaltenkirchen, where I./JG 7 was based, or to Parchim, where III./JG 7 was based, was in both cases 90km. In consequence, when Strübing heard the alert and jumped into his car, he had to drive under the conditions in spring 1945 around three hours before he reached the aircraft. The enemy would have already left the area, when he could take off.

The text of the presented document combined with the fact that Strübing was able to fly an aircraft and may be after the war he told something about the Me 262 created this funny story.