Are you sure that the "flaws" you see are not really "design features" intended to cope with the dramatic expansion of materials that happens as they heat WAY up ?

I considered that possibility and came to the conclusion that it was no the case. Firstly, the magnitude of the issues - they aren't in the 0-2mm range, rather the 5-10mm range. There is no way that thermal expansion is going to correct that. Secondly the materials - for the globe size problem, the metal components of the baseplate/ventilator are going to expand more than the glass of the globe, hence exacerbating that problem, and for the ventilator/generator problem, both items are probably the same material anyway, and should expand/contract by the same amount.