Changes

According to this [https://web.archive.org/web/20111211232234/http://myweb.tiscali.co.uk/mickfrench/rmnimbus.htm/ link]: It does not have [https://www.ebay.co.uk/sch/i.html?_nkw=Seagate+ST-225N&_sacat=0&_from=R40&_sop=15 Seagate ST-225N] 20MB HDD, [https://www.thenimbus.co.uk/images/parts/rm-nimbus-parallel-port-card-l.jpg Nimbus parallel port part no. 17560 issue A], [https://www.thenimbus.co.uk/images/parts/Serial Piconet Card - Internal-l.jpg Piconet serial I/F part no. 13989 issue 2] & Memory Expansion part no. 16270 issue 3