A two @-@ week work @-@ in was held at the end of July and beginning of August 1980 . Thirty @-@ three volunteers worked on the mill over the work @-@ in . Two new main floor beams for the dust floor were made from baulks of pitch pine which had previously been in a maltings at Bury St Edmunds . On 3 August 1980 , the windshaft and remaining sail fragments were removed by a mobile crane , followed by the cap frame and the cast @-@ iron curb sections .