Thank you, ulap1.
I agree, what you said about Tamiya motorbikes. Tamiya found in early eighties a nearly perfect way of designing and molding these models, a technique that is in use even today (only that there are too few new models). The same technique was applied to there F1-models, but (my opinion) it has degraded during the years, the earlier models where better, at least what comes to the engine compartment.