***"WHEN THE INSTRUCTOR KNOWS HOW TO TUNE THE ENGINE". My two-stroke engines seldom, if ever "die" in the air, unless I run out of fuel. Find an instructor worthy of the name and your two-strokes can run as well as your four-strokes.
***Any IC engine can stall, when improperly adjusted, two or four-stroke. Four-strokes can be more forgiving in this regard, but if the two-strokes are properly adjusted, fueled, propped and plugged, there is little difference once properly tuned. I flew pattern. Not once did I land without the prop turning over. Back then all we flew were piped two-strokes.
***Only someone without experience would think that a .52 two-stroke could be replaced by a .52 four-stroke. You'll need at least a .70, if not larger, four-stroke, to replace the .52 two-stroke powerwise. Now recalculate the difference in prices. Surprise!
***I said it was vastly superior, not perfect. Big difference.
***This is purely subjective. You are entitled to your opinion, as am I.
***Non ball bearing servos were "good enough" back when oilite bearings were cast into the servo case top. When they went to pure plastic they had to loosen the fit to the point where the average model could develop surface oscillation with the average installation. This is unacceptable. Buy the ball bearings up front and get a discount.
***I reiterate, FMS is garbage. Buy a decent simulator and you can eliminate most of the need for an instructor. Hell, I taught myself how to fly by reading lots and lots of full scale aviation material and then applying it to models. PCs did not exist back then (1969), much less computer flight simulators.
***If a club is around long enough, I promise you that it will go the way I have described. It will also evolve out of that into another pattern that may be worse or may be better. Having been flying model airplanes of one sort or another for over forty years, I've seen quite a lot of water pass under the bridge.
I organized and ran such a committee in my last NJ club. When one of the requirements for landing right to left was that you had to enter the landing from a right hand turn, half of the alleged instructors quit. I loved it. Now they would have to pay for their own crashes, instead of their student pilots. The club survived and prospered.
***The reason that I am dead set against having too many questionable instructors is that it makes it impossible for the club to ensure that each student is given proper "ground school". Familiarization with the club rules (no flying over the pits) and stuff will not happen if all we have are a bunch of unorganized yo-yo's whose ego demands that "they" be the student's instructor. I have seen this so many times in my years of flying models that it almost causes a gag response at the mere thought of it.
We can actually shorten the amount of time that a student pilot needs to commit to spending in order to become a competent R/C flyer by organizing the material. Offering study guides and actually teaching them how to start their engines by making them start their engines with instruction and explanation. I'm not such a grouchy old ogre. I just like it when things are done thoroughly and efficiently. After all, I joined the club to fly my models, not to inflate my ego by making dozens of folks dependent upon my knowledge in order to fly.