I have recently been considering building my own springer action with lighter materials and reduced comp tube diameter , as my 21mm seems to have been well received . I was considering building it for FT, the format I came up with featured side lever cocking ( minimum interference with the barrel) and sliding comp tube.
So it looks like I have invented the Dana 52 , So maybe convert a 52 first to see if I can get on with the cocking when I have my sightron on top , and see if the "free floated "barrel is inherently more , or less accurate than the underlever set up.
I don't know much about the Dianas , who makes the barrels for them ?, does any one own one and what do they shoot like .177 of course .Thanks in advance.