ShortMan is right.... Moki rules when it comes to power.
The 1.8 has proven it's self for many years. I own the 2.1.... It too is a very strong engine. The only reason you don't see more of them in use is their fuel consumption. The 2.1 will eat a gallon of fuel in 4 to 5 flights.
But bud you got power!!
The OS BGX and the Super Tigre 3000 cant and never have matched the Moki in power or reliabilty.
The OS 1.60 isn't in the same class with these engines

Southerngent