Sgt Mac, I'm going to ping someone to this thread that has issues with scoliosis and crooked, weak legs and cycling who may have some input to help you out.
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. “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche
"We can judge the heart of a man by his treatment of animals." - Immanuel Kant