PVC size for storage cart. Revo 13.

Will be building a storage cart for my revo 13. What pvc size should I be using? I figure a little flex on the pvc will be good to mold the hull. Pros, cons for this? or should I go with no flex on the pvc?

I built my storage cart with 3" pvc.  Because of the curvature of the hull, only about 7' of the hull actually touches the pvc.  I glued on some indoor/outdoor carpet to help cushion the load.  Haven't noticed any deformation on the bottom of the hull.  I have a 2020 Outback.

I built my storage cart with 3" pvc.  Because of the curvature of the hull, only about 7' of the hull actually touches the pvc.  I glued on some indoor/outdoor carpet to help cushion the load.  Haven't noticed any deformation on the bottom of the hull.  I have a 2020 Outback.

I store mines upside-down. No deformation yet. Had it that way for years now.

Anyone build one for a revo? What size PVC? There is a drain plug sticking out the hull under the seat area. Does this impact the revo from sitting on the PVC? I currently have it upside down but want a process to have the revo rigged and easy loading/unloading on/off the truck bed. Any insight appreciated.

Ive used 3" but i have my revo on a bed of foam blocks