Gehard wrote: > Generally, one should check the minimal patch size specified by the > instrument manufacturer. Accuracy may suffer if the patch is too small, > even if the instrument still seems to just fit on the patch. Ah yes, good point. I haven't checked this yet. I would not be surprised, though, if the patch size required in order to allow rapid manual placement will exceed the minimum by a healthy margin, although I agree that it's wise to double check this. I am not making the patches "just large enough to fit the device" - I am making them large enough to allow rapid placement. Greg.