Anyone made own laminar flow? I am not living in USA, and in my country there are really no portable laminar flows. I asked like 15 company untill now, all flows are for big lab design. If I try it import customs ask about certifications of it and + taxes bla bla so much work.

I was cooking little batch for myself and my friends, some of them contest and I give my gears at low prices cause It isnt money making for me. It is my hobby and having fun.
Anyway day by day people wants more gear from me, even now I have good setup actually for a homebrewer but I want move it an upper level so I want to make a laminar flow, there are videos on youtube but I dont know if anyone has experienced that because air flowing in flow is important or keeping hepa filter clean bla bla, or it would be good what problems may occour during diy process.