Dual dock charging station spacer

I designed a spacer that fits around the iphone cord so the head of the cord has a solid base to press against. This spaces reaches from the bottom of the hard part of a standard apple lightening charger to the bottom of the "Dual dock charging station for Apple Watch and iphone" located here: https://www.thingiverse.com/thing:2124377. This spacer raises the charger plug up about 3mm so it can plug in properly when using a case. including fusion360 file for editing.