i understand what you mean about engine mods, and if you do not know what you are doing, is more harm than good.
i was looking at the informative side of what was posted, as in the calculations for timing, and stroke positions. i know that there is no single perfect mod. more or less like with 1:1 cars, a single mod wont do much, but most mods compliment each other to make both better than one single mod.
its a shame that nitro isnt as big as it used to be, i understand the want for some to run electric but imo it feels lazy running them, except for certain types that nitro is a hindrance (i.e. rock crawling).