With regard to the questions about the long gear legs that Texas Taildragger supplied with their later conversions here is why they are easier to three point.
With all three wheels on the ground they are sitting at a higher angle of attack than the conversions with the original gear moved forward.
Therefore when you three point them you will be at a lower airspeed because you can increase the angle of attack more than with the short legs.....lower speed equals less chance of the f.cker going flying again once on the ground...
It is really quite simple.