I have a K3/10 with no add-ons, and now am ready to get a KPA3 100W amp & KAT3 tuner, to install myself. I would rather not purchase them at the same time. Is there a more favorable order to get them? Amp first or tuner first? I suspect there may be some construction issues that would favor one over the other to be acquired first. Thanks & 73, John K5ENQ