There are Mk1,Mk2,Mk3 & Mk4 Versions of the Loxton 5
Mk1 Pre August 2012 Has a single top brick (baffle) which sits into the cut ou in the rear brick.
Mk2 Augudt 2012 - march 2014 has two top brick Baffles (One upper and one lower)The rear bricks are straight.
Mk3 March 2014 - October 2018 has a single air control, two small top brick baffles supported by a bracket.
Mk4 (2022) SIA Model