Looks like a great build… congratulations on pulling the trigger to get it started.
I think it would be difficult, or impossible, have an oil top finish on an Alembic with a color-stain. The wood is coated with clear coat to seal it before the stain is applied so the color can be reversed in the future if desired. The oil finish probably won’t work over the clear-coat with stain on top of that, the stain gets sealed in with another clear coat. Oil needs to penetrate the bare wood to build a finish.
Are you thinking of having the top stained?