I currently have 6 Tatula's. A few are several years old and still work great but I am wondering if upgrading the original bearings might add some new zip to them? They have all been trouble free from day 1 and are regularly maintained so I guess I am just looking to tweak them a bit. I have added the drag clicker to all and recently installed a bfs spool in one and turned it into a rocket launcher.

Just wondering if this would make much difference or maybe it is time to replace them.

If the bearings are not damaged in any way I would simply clean them and relube them. The gains from aftermarket bearings are not going to be night and day noticeable. Perhaps quicker startup speed for the spool, more distance with less effort, and a small gain in overall distance. If I were to buy upgraded bearings it would the HH Air or ZPI bearings.

I too think that cleaning and oiling them is all you need. The aftermarket bearing market will not yield the gains in my opinion to justify the cost as Kickerfish mentioned. I recommend cleaning the bearings or sending your reel to a reel tech to have a full service.