Originally Posted by
mtbikerinpa
Looks like a prime candidate for a low temperature Alumi-braze or similar process(like HTS-2000) which can be used with a propane or mapp torch. For that juncture I do not think it would pose any risk if done properly in combination with a longer, tight fitting post.
How low is "low temperature"? Anything using any kind of flame would have me worried about having to have the heat treatment on the frame redone to avoid weakening the alloy.