Try a Google search. Harry Curzon reviewed it in Model World Feb '98 and has some posts in which he raved about it, while criticising the instructions. Said it is a builder's kit with very light construction, very accurate to scale, and handling was "viceless, but crisp." He lists it as one of his two favorite models.

I don't know what engine he used, but a 70 FS is at the top of the range and the OS is a heavy one. I would go for something lighter myself because I would not want to get stuck with adding tail weight for balance. But I have not built the kit, so that's just a guess. Jim