Thanks a lot guys for kind wards.
Very often I am thinking about hobby, but it is in the past. My field of business have changed so my hobby.
BTW, I recently found video of what I was racing back in my days. I am pretty sure not too many people have seen it. It is not video with me, just the same stuff I was personally raced. As you can see on the videos, there is n control over engine or boat ones it left hands, no Nitro, pure Methanol and castor oil. So, all art was about to build right hardware and tuned it.