Bottle neck adapter

The request

Make a parametric tube adapter: a straight round tube 30 mm long along Z, centred on the origin, with Z up. Expose two controls named exactly `outer` (outer diameter, 20 to 40 mm, default 28) and `inner` (inner diameter, 12 to 36 mm, default 24). The wall must never get thinner than 1.2 mm: if `inner` would leave less, cap the bore so the wall is at least 1.2 mm thick on each side. Name the sub-part exactly `tube`.

What the AI judge checks

• A straight round tube, open at both ends
• The wall looks the same thickness all the way round
• No flanges, threads or other features were added
• You can see straight through the tube

Measured checks

• one sub-part named tube (gate)
• outer is exposed as 20 to 40 (gate)
• inner is exposed as 12 to 36 (gate)
• default tube is 28 across and 30 long
• bore tracks inner, capped so the wall stays 1.2 mm