thanks for staying with me....
intake boot, completely went over - all good
hoses on back of manifold, intake or exhaust? (any rubber hose that I could see I ran my hand across)
brake booster lines,Did not check this - will tomorrow
DISA o-ring(I'm assuming you replace it?) Replaced some time ago, had to give it a good pull to get it off, not flattened and felt confident it was tight
purge hose(front of manifold) humm...replacing the purge valve I did give a good tug to the hose that goes under and towards the exhaust manifiold - cant see where it ends, could I have pulled this off????

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2004, X5, 3.0, 202k+