Had a pro fit (Tad Hughes - Houston) five years ago at 75. Have not changed bike setup. Just changed pedals/cleats and added aero bars. Getting ready to celebrate 80th BD with century ride and looking at things I can do that might help.

What is bothering you that you want to solve? The only thing I can think of from what you share is that the new bars may have altered the reach and drop you previously had and the new cleats and pedals may not have your feet in the same position.

If you ridden it since on some long rides and nothing bothers you or seems more uncomfortable than before, then you should be good to go.

Another fit, if not done by the same person or at least the someone with the same views will only confuse you as to whether the original fitter knew their stuff.

Sounds to me like your current fit can't be too bad. I haven't changed my fit on my single in maybe 15 years, nor changed the fit on our tandem since we bought it in '07. Of course I've changed my saddles a few times, which always involves height adjustment and the re-imagining of what "level" means for a saddle. And which doesn't mean I haven't tried different things to see if they improved anything, but no, they didn't. Fool around with it if you want to. As long as you know your current measurements, it's easy to go back and who knows, you might learn something new.

I've never gone to a fitter. Why would I want someone else to tell me how to perch on my bike? I can easily tell what makes me fast and powerful on a bike.

https://www.parktool.com/blog/repair...icle-section-1
For a number of years I've been tracking my bike fit with the Park Tool Positioning Chart. I have these charts going back about 9 years. It is instructive to review these charts and the position represented over time. My recommendation is you download and print the PDF and add in your own measurements before making changes. Then, if a change does not work out it will be easy to get back to the previous position.

Re: chart and more importantly instructions - Thank You! That will help me record the starting point and keep track of changes. My main reason for the question was - aging body. I have lost over a inch of height. And that must result in some changes to fit. The table negates need for Pro fit. Thanks again.

ctpres, I'm 80 years old myself. I began cycling at age 71, one of my best decisions over a lifetime.