Blackcat: All are welcome here who are
1) willing to follow the rules please read them
2) willing to show respect to others
3) Want to learn about building engines.
Please post a thread in the introduction section and tell us a bit about yourself, your shop and your interests. I do not know anything about Vietnamese culture . Here on this forum it is rude ask for plans or offer something for sale on your first post. so post an introduction and I expect someone will help you .
Tin