Now I'll have to draw out the combined circuit of four of those (NC versions) strung in series, so that I can use a single input for combined limit switches, just to reassure myself that it should work - even though I've wired it up on the bench and it does seem to.
Not sure but I recon they will be ok for limits but if used as home combined.
I think there will be an increasing delay put in to the circuit the more you connect.