I remember attending a talk that Cole Palen (RIP), of Old Rhinebeck Aerodrome fame, gave 30 years ago, or so. He stated that one of the reasons that the Fokker Dr.1 was so successful was that it was aerodynamically unstable. It required constant input from the pilot to keep it flying straight and level. Absent that continuous input, it would tend to spiral out of control. But, as a result, it was also very adept at turning quickly, much more so than some of the Allied fighters of the time.
Also, as of that time, there had been several reproductions of Fokker Dr.1s built, but all of them had lengthened the fuselage, in order to increase aerodynamic stability. From the article, it appears that this reproduction may be original with respect to the length. If that's the case, then I wish the pilot well.
Plus, the Germans had mastered the art of the interrupter for the machine guns, so that they could fire through the propeller arc, without shredding the propeller. That allowed the guns to be mounted so that the pilot could sight down them directly, rather than having them offset, as the Allies were required to do.
As for the Lycoming four cylinder engine, that's quite a deviation from the original design, which used an Oberursel Ur.II 9 cylinder rotary engine. The rotary engines contributed, somewhat, to the handling problems of the original planes, since the heavy mass of the engine, spinning as it did, created a rather tremendous gyroscopic effect. As such, planes with rotary engines tended to turn and dive in one direction much better than the other direction, and exceptional pilots tended to recognize this, and make predictions on which way an opposing pilot would turn while in a dog-fight.
Of course, rotary engines presented a BUNCH of rather serious problems. One was that they were two stroke engines, with the oil being mixed in with the gasoline. The throttle was typically set in a fixed position, and power was controlled by controlling how many cylinders fired on each revolution of the engine. In order to avoid fouling the spark-plugs, Castor Oil was frequently used. Unfortunately, the exhaust stream of these engines tended to direct a lot of the exhaust gases, which contained a fair amount of the unburned Castor Oil, back into the pilot's face. Consuming Castor Oil has a certain effect on the human digestive system. Not all emergency landings were due to mechanical problems with the plane!
Even with the lubrication system, the lifetime of a typical rotary engine was approximately 25 hours between rebuilds. OUCH!
Maybe that Lycoming 4 cylinder engine isn't such a bad idea.
P.S. I'll get my coat. It's the one with the roll of toilet tissue in the pocket.