I'm getting my first bike fit since 2015 which is when I first bought a bike. I came from a marathon background into triathlon and I just let the fitter do his thing. I'm not entirely sure how effective that fit was (It was a full analysis type fit that took a bit over a hour with the whole video analysis, measuring angles, etc.) since I've found in the last 4 years that I can pretty much be comfortable in any position on the bike. For instance, my saddle is normally pretty high, but for one Oly I did this year, I didn't tighten that down enough, and I noticed only after the race that my saddle was completely lowered as far is it would go. Power numbers were oddly fine for the race, I felt OK, maybe it fell only in the last mile or so, who knows. Regardless I've played drastically with my position over the years and have not found one I can't hold for hours on end.

So anyways the main reason I'm even getting a fit is because I'm in the market for a new bike and if I'm going to spend a bunch of money, I want to be sure it will be perfect. I also want to get a bike that will allow me to maximize my aerodynamic position and power since I'm running under the assumption that I'll probably be comfortable with whatever he sets me up with once I buy the bike. Basically it's gotta be the frame that best fits my annoyingly rigid bones.

What I don't know would be the types of questions I should be asking my fitter. What does the ST community recommend?

EDIT: Oh, current bike is an aluminum road bike (Caad10) with a TT cockpit and fast forward seatpost. Frankenbike. Buying a "real" TT bike.