Thanks all!
Especially Mr. Pass
Front plate I finish with belt sander and finalizing it with sandpaper by hand.
It's very important what kind of aluminium you have.
My language knowledge is not enough for detail explanation. Sorry! I work on it.
My friend makes top holes with primitive mechanical machine (he call it "can-opener"). I didn't see that.
Especially Mr. Pass
Front plate I finish with belt sander and finalizing it with sandpaper by hand.
It's very important what kind of aluminium you have.
My language knowledge is not enough for detail explanation. Sorry! I work on it.
My friend makes top holes with primitive mechanical machine (he call it "can-opener"). I didn't see that.