First, I wanted to model a race car, but because I couldn’t complete that, I inevitably had to change it into a vacuum cleaner which is not complete as well! Most likely, I can finish the vacuum, at least.
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Have you seen this video? That may help if you want to turn it back into a race car… 
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Hello, senior
Sadly, I don’t have access to YouTube in my area.
But I remember, when I designed a primitive car with SubD (integratory), you advised me to model a car part by part. After that, I began working with patches and progressed step by step. At present, I know how to design an object like a car through this method, but my problem is that I’m not patient enough to work on an object for more than one or a maximum of two days.
So I think if I spend more time, I can model a new car body regardless of all its technical details.
Thank you so much for your attention 
can you get vimeo? same video-
No sir, I can’t
Basically, access to videos is difficult in my area.