Light sport home built aircraft pilot reported loss of control during landing which resulted in gear damage.

Narrative

Airplane is very short coupled and is a handful landing; conventional type gear. Landed center of runway and plane began gradual path to the left; I countered with right rudder and brake and it began to the right. Recountered with left brake and it continued right and strut/spring tubing buckled under and caused a 1/4 turn to the right ground loop with left wheel buckled under. No prop strike. Minor gear damage. I flagged down the local A&P and he helped get the wheel back under the plane and used a ratchet strap to keep the wheels from spreading too far. Taxied back to hangar. Contributing factors: 1 link too many on tail wheel rudder horn springs/chains. Tail wheel not as responsive as direct rod coupled tail wheel. Will change springs to stiffer Maule style compression springs from extension springs.Noted when going over paperwork the bill of sale and registration copy had not been mailed so it got placed in the mail. Also noted my basic med doctor visit was complete but the renewal questionnaire showed not current; so I retook the course and passed.