Hi, Paolo,
I've just come back to this forum page after some time away. I'm very sorry to hear that the auto hasn't yet got off the ground after all your labours, though not entirely surprised. There are a very few very high end bespoke watchmakers who manage to sell at an extreme premium price, but the A-13A auto is too cheap for that, though possibly too expensive from a relatively unknown brand for those like me who'd also think about a Sinn EZM1 or 1.1, or Damasko DC80. If you look at Sinn's prices, they and Fortis were very much at the toolish end of the watch spectrum 10-15 years ago. Fortis is relatively cheap, still, but Sinn's prices have risen quite a bit in the last few years - though on the back of a lot of technical development works.
I've got a Fortis B-42 Titanium Cosmonaut with the Lemania 5100. It's a great pilot's watch - not that I've done much flying in the last few years. I also have a Sinn 140A LE with the Sinn SZ01 movement - a modification of the Valjoux 7750. It's a great watch, though still overshadowed for me by the Fortis, and I'm thinking of trading it for something else and, I hope, getting another Quartz A-13A (I traded my first for the Sinn).
Would I buy a chronograph because it has a flyback? Well, I have thought about a used Breguet XXI for $5k to $6k but can't afford it at the moment. It appeals because, though it's similar functionality to the Lemania 5100 Fortis it's more dressy, and has a 200-year old brand history. The flyback is a factor, but a relatively small one.
Would I get an auto A-13A? Well, that's the other problem - the quartz model is so good, apart from weak lume, that it's hard to justify the significant premium for an auto version which functionally gains the flyback but loses one of the best features of the quartz - the quickset hour hand (great for travel, whether in the cockpit or in seat 45K). The Quartz is a great watch at a good price point; but there is so little visual difference between the two that it's hard to see the extra value in the auto - and I completely get the point about the cost and scale factors of the auto's price.
I wonder what would it cost to switch to a refurbished L5100, 5012, or a SZ01 movement - Tutima, Sinn and Damsko all have the latter or something similar - and add a 12 hour bezel and a date? It wouldn't have the purity of the original design, though's always the quartz, but I have seen watch clocks like the A-13A with bezels, and I'd be interested in one - particularly if I could get it in Titanium. Perhaps Fortis's case maker would sell you a B-42 titanium case - it must be similar dimensions and similar thickness to the A-13A auto...
Cheers, and good luck, Paolo.