1st question: When I pull trailer with a 36" toro and a couple 21" mowers should I be using 2 drive or just keep it in D? I'm using my 92 GMC Sierra. This is the trailer. 2nd Question: When engaging the blades on the 36" Toro, should you do that when it's at low throttle? I've been doing it at high throttle for three months (it's three months old) but I only use it two days a week. I started engaging them at low Idle today to see if it would work.. and it does but it's a pita. Every time I have to lift up a drain pipe or move something I have to throttle up and down and well as engage and disengage. I almost wish I had a clamp with me so I could just leave the blades spinning.