Carbon tube to Titanium sleeve - adhesive and gap recomendations

I'm repairing a titanium bicycle and would like to use Easy Composites tubing.

Unfortunately the OD of the carbon tubing you supply does not exactly match the ID of the frame.

The ID of the titanium tubes I have are:

1. 42.7mm

2. 33.1mm

3. 30mm

The closest tubing you show is

1. 42.7mm closest tube has a 40.9 OD. This would leave a 0.9mm joint gap all the way around.

2. 33.1mm closest tube has a 31.3 OD. This would leave a 0.9mm joint gap all the way around.

3. 30mm closest tube has a 29.3 OD. This would leave a 0.35mm joint gap all the way around.

So I have a few question about resolving the difference.

1. What is the recommended gap/joint space when sleeving carbon tubes with metal?

2. Can Easy Composites supply custom tubing at the these OD 30/33.1/42.7mm suitable for bonding the to the OD?

3. Please can you recommend the best adhesive?

Thank you