I am scratch building from the RCME plan and have a couple of questions. What is the best method to cut small parts; bulkheads and small curved items, from 1/8” balsa Really tough to cut with razor knife or exacto. Maybe a coping saw? Also the plan has some parts I cannot determine where they go This includes W15 and W16. Also F4T, F3T and there are two F3s. Rest of the cutting is going well. Will post some pictures once I start assembling. This is my first model. Thanks