leave the gun as is im sure you can find a bubbaed gun(a gun that has been hacked up) i know i have restored a few now to what they where and i got one bubba really had his way with with a cut barrel this is sadly too far for me to restore but it will make a nice .22/303 sporter (coyotes watchout :) )
id love to find a original no.4T but i do have two no 4 mk 1's and one has not been fired since my great grandfather brought it back home in 1945 the other was bought after the war and has been shot quite a bit
i would not shoot any mk 7 ball its more collectible then anything i have qite a bit of it and i still will not shoot it although i have in the past and they do tubmble when the hit the target (deer) just as intended with the light nose