Ya, when you really think about it, and all the hidden and through tang knives made throughout history, hardly any were ever soldered. Not sure about the history of solder but I'd venture to guess it's a relatively recent innovation. As long as you seal it from moisture and dirt, which a tight fit and a dab of glue should do, is no problem.
Anywho, I cleaned up the knife, again. Tight fit. I won't have to finish before I leave for work, but I did pick up an unfinished blade I started years and years ago. Almost done.