My Stelling Sunflowers banjo is nearly 12 months old. Apart from tightening the head once, changing strings and tightening the tuner screws, I haven't adjusted the banjo in any other way. It sounds great atm.
Do you think there is any need to check the coordinator rods? I'm wondering if they loosen over time - given you want the best neck to pot connection. BTW - the nuts holding the rods are tight.
Yes, you should check the rods occasionally. Seasonal humidity can cause both expansion and contraction of the wood causing changes in tone and setup. You don’t have to loosen the strings to do this. Loosen the lower nuts first (the ones by the TP) then check and tighten if necessary the lag bolt side. Then re-tighten the lower nuts. Also check your truss rod adjustment seasonally.
I agree with the above about checking if they are loose, but if not and you are happy with the tone, don't touch them. If you want to test how even the slightest adjustment can have a dramatic effect on the tone, you can do this with the bottom nut of the co-rod. Tighten that nut 1/6 of a turn and pick the strings, hear the difference? Do it again and listen again. Now, since a nut has 6 points you know you can reverse that back to where it was. I typically spend time with that nut as my final step in setup.