Have 3 road bikes and never had a professional fit on any of them. The first bike- Boreas- took a bit of time to set up and to an extent was trial and error.Second bike and on assembly with the mechanic at the LBS I had the critical measurements to guide assembly for fit. Only part that I changed was the seatpost to the same as the one on Boreas as it is an inline seatpost that allowed the saddle and post to be interchangeable between the two bikes (Same diameter and similar saddles by the way) But over the years those two bikes have been set up differently. Boreas is the "Go faster" bike with a more stretched out and lower bar position and the TCR is now set up for hills with a slightly higher bar and saddle 1/2 cm further forward.

When I got the Pinnie last year I got a frame with the same seat and head angles- 1 cm shorter Top tube and 1cm longer on bar stem. Assembled it with the bars low but they got raised a bit for the use it is put to.

So 3 bikes- each has its own strong points and each is basically the same but with subtle changes for the use that the bike is put to. And each is comfortable although I would not like to do a hilly century on Boreas due to the gearing and the low bars.