Is there any comprehensive tutorial about fillets and their related problems in Rhino?

Hi guys,
As you know so far, I have problem in complicated fillets. Espicially, trimming and cleaning fillets is sometime very difficult for me and I don’t know how to go ahead. In some situation fillets are messed up and I cannot get my desired result. Is there any Youtube tutorial that explain those fillet problems and how to cop them?
Please help me.

1 Like

Thanks @mikolaj,

Are the original 3dm files available to practice with - for the examples on this page: