Eeek!
I think I'll try and forget how to get an 8 x 4 sheet in. All a bit too close to my head for peace of mind.
That said I have done similar with smaller stuff, 2 x 4 et al, diagonalised and appropriately strapped. Frankly I'd have taken money that a full 8 x 4 sheet would have needed an inch or two more lengthwise than was available.

My method is to strap the two parts of my sectional ladder side by side on the roof bar cross rails to support the sheet(s) and strap them down to the ladders. Mucho faff solo but it works. Hopefully I'm past playing Bob the Builder tho'. 12 ft plumbers tube goes on for long thinner stuff but a length of 2" round steel bar and 3" alloy bar in together was bit optimistic. Insufficient padding made for serious sound effects. It's great having a comfy car that also does the Transit Substitute thing so well.

I really should sort my version of a tow hitch'n tripod crane tho' to help with loading.

We've been summoned to Ramsbottom for Christmas. Doing the 300 odd mile run from Crowborough in one hit should do the big red beast good, he pretty much never gets over 40 miles in a run normally, and remind me how good an imitation of a magic carpet a P38 can be.

Clive

Living in a village,mine never goes less than 20 miles if I'm going anywhere but I've found that it gets better the further it goes on a long run. It settles to a happy cruising speed of 70-75 on a run to Dover but once off the ferry, for what seems like the same throttle opening and its at 75-80. Although that might be due to the lack of traffic and the billiard table smooth roads on the other side of the Channel.....

Plywood, sheet insulation, pipes, Steel concrete reinforcing rods (20 ft) assorted sized lumber up to 12x4x16ft beams.....
Etc....Basically everything needed to build a house. If it does not fit inside, it goes on the roof rack, which holds up waaaay more than it is rated for!

And if the roof rack is not enaugh. It can tow three and a half ton.

th.

+1 on a good trailer!
I wish I still had my ex military trailer.
When Bolt was the work truck in Hawaii, I used to tow 3 ton pallets of batteries and electronics up a very rough track from
sea level up to 9000ft every couple of months for off grid power systems.
Best off road towing vehicle I have ever used!
Roof rack was great for the long awkward aluminum PV panel racking! I made a brace that strapped to
the front brush bar to support the front ends of the frames.

I just turned 72 & intend to keep my P38 until I am no longer able to drive. My wife is ten years younger than me so I am encouraging her to drive the car so hopefully even when I am too frail to drive we will still keep the car.