Thanks. I will take a look at those. The Actuonix ones
(https://www.robotshop.com/en/p16-linear-actuator-50mm-2561-12v-potentiometer-feedback.html) I am using have a perfect stroke length for my Bad Boy mower but max speed is 4.8 mm/sec. They have 250 Newtons of force at 2.5 mm/sec, which is about 56 lbs. They have one that is 4 times faster but 4 times weaker. At $90 a pop, I’m hesitant to try them.
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