Well I wanted to give an update. The fuel sending unit and float were bad in the tank so they had to order that to fix the fuel Guage from always showing empty. The blade spindles due nearest the schute was bad as well which was the loud whining sound, and I had a weird machined bolt that needed replaced to keep the arm tight. They have had it for 1 week and mowed with it a fee times and claim they can never replicate the slipping hesitant wheel issue. I'm slightly perturbed by this as it does it every turn for me once warmed up. They still have it and continue to use to try and replicate it but I have my doubts that they are going to figure it out or admit to finding it. Once I get it back, if it still does it I'm not sure how to pursue. I'm wondering if I should just change the hydro fluid at 50 hours once time and purge the system to see if that helps it. Sounds like I should be able to do this myself?