Fusi Fin, but NOT maple! It would only be maple if broken and then REstocked here. Walnut or a fruit wood only and a barrel of 44” and as TRIM and LIGHT as possible … if it weighs > ~7-pounds, it was not built correctly. The oct breech area should also be fully tapered.
There's nothing wrong with questing for the perfect original specimen, it should be remembered however when we are discussing these types of items is that the perfect specimen doesn't exist if made prior to the industrial revolution most were made under contract to cottage industry, small shops usually with just a few laborers working with hand tools under poor lighting conditions and with crude measuring instruments.
The steals and iron used was usually reclaimed, there was no quality control over stock and furniture materials, even the screws were made one at a time and not one thread matching.
No two guns were exactly alike and none of the parts were interchangeable, in the originals barrels varied in length from 39" to 45" on average, lengths of pull varied as much as 1-1/4".
Just as an aside I've had four custom made French mod. D Fusil de Chasse made especially for me, each by a different maker, they are all similar, but not exactly alike, on the other hand I have two semi custom Center Mark French Fusil de Chasse fowlers made by the same maker in the same shop with the same tooling, one is stocked in Walnut the other in dark Curly Maple, except for the finish on the wood both guns are as close to identical as they can be, and the parts are interchangeable.
I would suggest that we think before we criticize someone else's gear or dress, while it may make one sound like an expert, is it really worth the cost of hurting someone's feelings, especially someone new to the sport, I don't think it is.