I'm the former manufacturer of the Jenson Lake Mower, invented by Mr Ben Jenson of MN. (I retired and sold the business to Elastec, Inc. in 2020, so I am thankful it will hopefully survive me.)
Feedback from our customers was very positive for CLPW. They said they saw a significant reduction in regrowth when they cut before the seeds formed. We found that to be true for many aquatic plants.