This is just a quick look at Fred from Brazil’s custom BMX parts.
Fred’s custom rear 36hole screw on freewheel rear hub, features allen bolt up axles, large cones and check out the angle on that flange.
Custom sprocket, looks plain but check out the detail further down the page.
This is just a rim that fred has converted to 28hole and drilled out the extra holes, its looks clean and cuts down on weight for all you weight weenies.
Old road bike front hub makes good 28hole bmx hub.
This is a more detailed photo of Freds sprocket