Frazer yes twin tube boiler could be used ( some of the French boys have gone down that route ) if i had just stuck to the title i.e. mini steam car i would have been ok the fact i wanted to make it scale is really the problem and the fact i mentioned Cadillac made things worse at that period no mater which model you choose they seem to be the car with the smallest bonnet/hood. For those of you find it hard to make a bonnet have a look at this
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Fail Legano A6 paint scorching would be the problem but it lets you see there are hundreds out there let`s wait and see i think i will come up with some thing. Would be grateful for some info on silver soldering the test boiler i made used up the last of my s.s.rods which were 1.5mm i have since bought 0.5 and 0.7 s.s. wire ( don`t know why maybe price ) and bought the smallish type torch Danny suggested (still to arrive ) Torch i have too large for sheet metal so any info on that will be helpful. Now i will try and put pen to paper towards the end of the week something will happen