The sentence in the above post that reads:
The big change here was the rear sight. The MK II 4 * was originally equipped with the Ross MK III back sight which was the major change between the MK II 3* and the MK II 3
Should read:
The big change here we the rear sight. The MK II 4* was originally equipped with the Ross MK III back sight. which was the major change between the MKII 3* and the MKII 4*