The model of the level is Johnson Hot Shot 40-0917. I take the level off the tripod and place it on a already confirmed (via a standard 4' bubble level) level baseboard. The level has adjustments to level and plumb on its own. The enlarger is a Beseler 45MXT. I first removed the lens holder and shot the beam at a mirror placed in negative holder. The beam is reflected down and the neg stage is adjusted until the beam reflects back on itself. Once that is done I repeat the process with the mirror in place of the lens holder--ta da! Done. Took all of 5 minutes.
Here is a link to the level-any model that has a vertical beam adjustable for plumb would work.