Yes, I prune back anything I don't need in the spring provide there is a bud or 2 there. I have never pinched this tree, it always seems to pop out a few backbuds regardless. Actually better placement than other spruce that I have pinched that seem to get poodley tips rather than interior backbuds. Maybe fall is a better time to prune but my climate can suddenly get extremely cold in the fall. I don't prune anything, on any species later than mid aug to prevent winter dieback. Spruce probably could handle it just fine but with something like Amur maples in my climate I think it's more important. Anyway, so far I'm happy with results so I'll probably carry on with the same treatment. Of course I'd be happy to hear about other recommended courses of action.
Mp