1. Manuel Ricardo does the actual fitting himself. I had my gun set up the way I've been shooting it for years. They asked me why I wanted a custom, I said I wanted some palm swell, and I didn't want an adjustable recoil pad, I have a lot of toe out, and don't like the way it sticks out, I wanted the wood to have the twist. They said no problem. After mounting many times, with Manuel looking at shoulder fit, looking down barrels at my eye, etc, he agreed the fit was good, and could do the twist and palm swell. They checked fit on both my stocks.
(I traveled with a high rib gun, and took a low rib barrel, and low rib stock, so they could make two stocks.)
2. You can go shoot the stock, and they ask if you want to. But the club doesn't have skeet, and was a 45 minute drive. I decided to trust my fitting, rather than go shoot a discipline I am not normally shooting, and risk doubting the stock because I am missing a lot of targets. The club has trap (bunker) and sporting clays.
3. Preferred airport is Porto (OPO) and an agent their told me they are seeing several hundred guns a year brought in now.
4. There is tourist stuff in Porto for sure. I stayed a little north at the Axis Vermar Hotel and Conference center, right on the beach. Cost of my room was 120 Euro a night. I did not rent a car, and the MR team picked me up and dropped me off each day. I was in the shop for about 3 hours each day, Monday - Thursday. (They also arranged for a transport service to take me from airport to hotel, and vice versa.)