JD Enterprise One- Planning fence rule & days Parent+Component

Hello all

If you could share your inputs in this scenario below please?

One Parent Item call it 1a (manufactured at facility) has 1 component ex. 1b(purchased via 3rd party suppliers). Assume 1:1 between parent & component

I would like to make to order 1a & buy to stock for components 1b.

Shop floor calendar- M-F. Weekends closed; Planning horizon periods are - 14days, 12 weeks & 18 months.

Parent- Order policy- 1, Planning fence rule C, planning fence 20

Components- Order policy- 1, Planning fence rule G, planning fence 20

Case-

12 months forecast loaded on parent, total 24 kgs, assume 2kg/month, 10th of each month.

5 months Sales orders loaded, 1 kg/month, 10th of each month. And on 6th month- 4kg is loaded.