I keep sending my little brother your updates. He thinks a 4in stroke motor is the ONLY way to go.... So the youtube videos and these pics are changing his mind now! LOL
I always say, do the best with what ya got. Know your material, it’s strong points and it’s weak points, proceed accordingly by exploiting what you can the best you can.
A 4 inch arm is added torque. It’s not a bad line of thinking.