I’ve seen lots of spring compressors. Two-pieces, basically a threaded rod with mating block-hooks on them. Then there’s the Branick (ETCG reviews this…). I understand there’s a large step in cost between them.
but then I saw this compressor on the German eBay :(tries to make picture work):
… it looks great. I guess this isn’t in the United States? any ideas how to get a brace on the widow-maker designs?