Hi Lex
The increased weight is one minor drawback, 20% + weight gain. The extra cost of the steel is also going to be a factor. Steel is usually sold by weight, an extra 20% ish cost there.
The cassis as specified and drawn is very, very strong. I dont think chassis strength is going to be an issue.
If you have access to low cost 14swg square tube, go for it.
Ronnie
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