Panels rivets

[cherno]

Thanks for answers

About chassis change I'm not going to rebuild a chassis so I keep my 1.5 thickness tubes
I prefer stay light. If we change 20mm to 25mm we increase by 30% the weight
and for thickness changing from 1.5 to 2 is also 30% more.
The result will be a heavy chassis ( 40kg with 20 and 25 and 1.5 and more than 60kg with bigger tubes ).
A best choice if with consider to change the chassis will be to stay with 1.5mm and use rectangular tubes ( round one are more complex to assemble ) to increase size only where it give more rigidity but it's complex to make the right choice.

I have allow side panels, riveting then is a very light change even if it not give big difference it can't be negative. I've planned to add rivet each 5cm on tubes joining top and bottom of the chassis sides.