Be careful, but go for it. Make sure your dropouts are properly aligned when you're done. I used a couple pieces of threaded rod (with washers and nuts on both sides of each dropout) and went nice and slow frequently checking overall frame alignment with strings. Went a bit past 130, let it spring back in, checked alignment, put the threaded rod back in, went a bit further past, took it out, let it spring back, checked alignment again, and repeated until it sprang back to 130 on the frame I did. It was a mixte (and not something as fancy as a Cinelli) so an extra set of stays reinforcing the joint, but just go slow and careful and you should be fine.