My stainless ITP A3 has died. I tried to find an answer, but couldn't find if a swap will work - one tread said it probably won't work. Can can all the components be swapped out with w working A3? Are they sealed in the head? Anybody done it? Tips? I have several other A3's, but only the one stainless and and before I buy another stainless, thought I'd check here first.