Sportmod Extended Spring Cup

[Sportmod Rookie]

Does anyone use one of Harris extended spring cup? Is there a bolt that just goes thru the bottom on the cup and screws into the jack bolt?

http://www.harrisautoracing.com/upload/2012%20pg%2015.pdf

[Sportmod Rookie]

http://www.speedwaymotors.com/Speedway-Lightweight-Extended-Jack-Plate,66858.html

In case anyone is interested I found this as a good solution for Sportmods too.