Next time I contact MiniArt, i'm going to strongly suggest they consider producing sets of items such as their window frames in seperate packs. They are (for those who haven't seen the kits) produced in injection-moulded plastic, and are much more economical than the grossly over-priced resin items.

Re. cutting vacuum-moulded parts, the secret is repeated cuts with a sharp knife, to lightly 'score' the parts to be removed. They can then be gently 'snapped-off' the excess....Jim