This is not an easy do.
The material you choose would be best suited as being "bridged" between the exiting material, by cutting off the Screen....extremely straight....2" below where it comes out of the Casing, leaving a full 4" coming off the Screen surface.
After cutting some "Black" Black Out Curtain material (check Walmart...they have some curtains like that but I'm not sure about how long they are...100" long is a Looooong Curtain....) to the width of the section needed, use Fabric Tape w/Fabric Glue to attach both edges to the exiting Drop material.
The Taped section must be FLAT....no bumps AT ALL or when you retract the Screen and leave it there for a while, a dented line ( or several) will show up across the Screen.
"Iron on" Fabric Tape (Hem Type) might be better if you can find it in a long.
Success in this will be subjective at best. The real issue is that when you need a significant Drop, you need to order a Screen that has such...adjustable if possible. Trouble is...I don't know of any such screens that come in a comparable shade of reflective Gray....they are all "Matte White". There are amlost for certain some Customized options out there, I'm sure, but nothing remotely priced in the Gray Wolf's range.
Anyway, your treading a slippery slope here. Once Cut, that screen will either be re-made into what you want, or become a Fixed Screen on a Frame.
Good Luck....
The material you choose would be best suited as being "bridged" between the exiting material, by cutting off the Screen....extremely straight....2" below where it comes out of the Casing, leaving a full 4" coming off the Screen surface.
After cutting some "Black" Black Out Curtain material (check Walmart...they have some curtains like that but I'm not sure about how long they are...100" long is a Looooong Curtain....) to the width of the section needed, use Fabric Tape w/Fabric Glue to attach both edges to the exiting Drop material.
The Taped section must be FLAT....no bumps AT ALL or when you retract the Screen and leave it there for a while, a dented line ( or several) will show up across the Screen.
"Iron on" Fabric Tape (Hem Type) might be better if you can find it in a long.
Success in this will be subjective at best. The real issue is that when you need a significant Drop, you need to order a Screen that has such...adjustable if possible. Trouble is...I don't know of any such screens that come in a comparable shade of reflective Gray....they are all "Matte White". There are amlost for certain some Customized options out there, I'm sure, but nothing remotely priced in the Gray Wolf's range.
Anyway, your treading a slippery slope here. Once Cut, that screen will either be re-made into what you want, or become a Fixed Screen on a Frame.
Good Luck....