Reflex means raise.
In essence, if such things need to be done, then the plane should be redone from square one, to eliminate the problems.
This is the primary reason pattern planes tend to look like they came from the same mold. There's one optimum solution to the pattern situation (or any other), so the successful designs tend to evolve towards the same configuration.
A different name on side is the only real difference between most of them.
You might fly the thing a lot, to get used to what it can do, and what you want it do, and bash it to do that.
Then build a serious version with all the improvements.