I want to upscale a known kit from a Bt60 to a Bt70 can any one tell me how to figure fin size . and can this be done using percentages so I can photo copy plans and enlarge ???? maybe I'm going about this the wrong way. help!!! Also need a BNC70L can't find one . either 3.1" or 5.0" not sure yet Sandman you listening?
BAR
John
BAR
John