When we picked up our new trailer yesterday, I did the criss-cross thing with the straps on the eyes that stick down by the shocks. However, I also noticed that the straps were in contact with the mufflers as they came across to opposite sides, don't think that is a good idea for a long haul. The front wheel was not a problem with the chock installed as I went through the chock and the wheel to opposite corners also.
I'm thinking perhaps to go through the wheels instead of the built in tie downs, I left the trike in 1st gear with the parking brake on, it didn't move at all but we only had about a 40 minute drive, any suggestions are certainly welcome.