VPI Scout 1.1 parts to upgrade HW~19

I am on a quest to upgrade my HW-19. 

I’m looking at buying a Scout 1.1 and using the platter and tone arm on my HW-19 mkIII.

My current table has a rega rb300. I understand that the JMW-9T tone arm will fit the arm board drilled for the rega as they have identical measurements. Any thoughts about this? My intel on this.

I’m also wondering about the junction box? What is the best way to mount this? Mat from VPI has shared a similar upgrade before, but we never saw clearly how the box was mounted. Or ,more importantly, how the tone arm wire was connected? Video. And how does the anti-skate assembly work in this case? In the video (around 5:52), It looks like it is attached to the back of tonearm base? Is the anti-assembly necessary? 

The 1 3/8" thick Scout platter is a drop in replacement. If I upgrade the suspension using Herbies big and tall tender-feet the platter weight should be fine. 

Thanks for any help.

I’m using this image as inspiration.