I have removed the two piece foam RS filler panels that stores the small compressor , bottle of gunk, tow hook and fuel filler attachment simply to allow more room in the rear luggage area. I have levelled under the floor and reinstalled the carpet panel and then used the boot liner that probably came out of your ST….and hey presto…..I now have a much more useable luggage compartment.
I am on the lookout for a nice Ford Performance bag to store those items removed as well as a first aid kit, emergency water, a few spare cloths.
Give it a go…..see if it works for you.
Cheers Roger Morrison