Do it! It's a perfect way to remember and honor your Grandad. I remember one specific incident regarding my dad's passing. Within a few months of his death I went to the basement to check out the furnace to start it for the winter for my mom. There at the furnace on the floor laid, undisturbed, a handful of Dad's tools that he had last used most likely for the same purpose. Those tools were put in a special place, and I continue to use them often.