Front triangle is finished now and fillets rough filed. I didn't sleeve anywhere except the top of the seat tube. In the end I decided it was extra work (more to get wrong) and extra weight for no real gain.

I am now starting on the stays and have this morning rough mitered the top of the seat stays (Miter templates are brilliant thankyou Rattlecad :-)

I am not sure the best way to go about brazing this joint. I would like a nice clean joint and want to avoid filleting around the outside.

My plan was to make up some internal plugs for the seat stays to increase the joint surface area - see photo below - miter them with the stays and silver to the seat tube.

Does this sound like a good idea or an unnecessary complication?

Would the joint be strong enough without the plugs - silvered or brass? I would prefer to stick to silver as the top of the seat tube has already seen 2 heat cycles.

Your opinions and advice much appreciated as always :-)