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Thanks for the tip Lester.
I will look at how I could add some sideways wheels as I think that is definitely what is happening. It is possible the trusses I have made flex down. The 2 steel 100 x 40mm x 3mm are pretty heavy. Add the roof and trusses and you would have about 175kg.
The trusses though are only holding the roof up and that would weigh about 80kgs or less.
Richmond wheels and castors seem to have a huge range. There is one in particular PU350 which is 75mm in diameter, ball bearing, 1/2 inch axle and only 29mm wide including the ball bearing housing. It also can take large weight loads. These guys are in Wetherill Park.
Greg.
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