I believe you are only "required" to resubmit if performance parameters have changed due to deliberate modification. Replacing a resistor on the main board with one from RS should be OK!
But your last point is interesting, Robert. I have known places where the policy was to do just that (
ie, farm everything out). The trouble was they could not find any "company" to take on some of the kit - especially the "minor" stuff (too old, too unusual ... too
difficult, couldn't source spares, no manuals
etc., etc.). In fact, that's why I was involved (you know, to take care of all the
crap)!
But that way what you often end up with is a mess of service contracts (various dates, various levels of service, various qualities, various prices, always on the 'phone trying to get "them" to come in ... and all the rest). So the next step is to bring in a Managed Equipment Services company to manage the whole thing on your behalf. Only then (you hope) can you sit back and relax - with just the one "company" for you to keep tabs on!
