Hey Bearcave.......pleasure mate !

Let me just explain to all thinking " Does this guy live on his PC " .......for those who do not know, my No1 daily priority is 'Home Schooling' my 4 awesome kids - at the moment they are all 'Studying' for the end of year assessments - so I am free'r as I watch over them, to respond in more depth to the current subjects being discussed.

So Bearcave....Rather use 2mm ( 1/12 th) aluminium as apposed to brass - ali is lighter and has more flex. You dont need to braze any parts.
The pivot pin is simply secured by a nut on either side of the Bi-Fins platform.

As for the 'Down force tabs - allow your self the length to add them - as you probably will...........

Bro ********. ...
Share the Stoke !