The simple answer is you need to get as much information as you can from the photo of the plane you are building, because there was a lot of variation.
A few thoughts:
- The windshields varied. Some had none, some had a little square one in the W strut at the front. Here's a picture of a Hanriot machine and I cannot see a windshield on it:
https://i21.servimg.com/u/f21/11/42/56/87/sopwit10.jpg- Seat? No idea, I have never seen a photo of the inside of a French-built machine. Likely if it was built by Hanriot they may use their style of seat.....
- Seat belts? Again, no photos as far as I am aware. So as it was French-built, French belts are more likely IMO.
- Silver or CDL? Yes. Your choice. It's a subject of much discussion. Restorers at the Memorial Flight stated that the French Sopwith Strutter handbook specified aluminium dope, but many people feel CDL is likely based on photos. The photo I attached seems to have shiny (aluminium?) wheel covers but the fuselage looks a different colour.... Look at the restored example in Le Bourget:
https://www.jetphotos.com/photo/5925644. You should base your model on your interpretation of your photo.....
- Tail markings - on the photo I attached of a Hanriot it says S OH-TYPE1 . Not sure what is under that.
- Engine. It varied, could be Clerget, Le Rhone or Gnome. Clerget 110s were most common on British machines, again if you can see the engine on your photo that would help. The original Strutter in the Brussels museum appears to have a Le Rhone engine.
Can't help with info on guns I am afraid.