this pic is so old but it helps alot
Note this is a firestone 2500 bag.
I will see be re-doing this for other reasons
But I've been running this set up for over a year with no problems.
#1. Is were you need to notch so you wont rub.
#2. Is a Bumpstop you need to remove to lay.
#3. Is another bumpstop you have to cut out or notch so your bags wont rub them
Dont mind the chains haha, there cut away now
Were all the arrows are is were you would take a sawzall or cut off wheel and cut off the cup.