I found some confusion on what you get when you order the injector o-rings.
Item 'Gasket; Injector', part number 8-17113-400, quantity ONE, for about $14.00, delivers a bag with 16 o-rings. Eight fat and eight skinny. All about the same diameter.
St. Charles had a note indicating the part number bot only one o-ring. I will call and give Merlin an update tomorrow.
Alpine did, just this week, send me a new and improved cable bracket. I have not done the install yet to know the difference.

Roy