[quote=lloydo;409210]Lastly, does anyone know what the differences are between the Mk I, Mk II and Mk III scopes? Which one was the best in service?

I'm not sure if the answer to your question is here, but I believe that it has been raised before on the forum.

https://www.milsurps.com/showthread.php?t=42382

I am sure that others will be interested to hear how you get on with your repro scope because I believe that there have been issues with some of the other repros on offer.