D-rings/anchors are more quickly installed than velcro.
First, I was impressed by stability changes removing the Titan's seat pad lowering the body CG 3/16ths. Then respecting the Drom's price, a relaxed intsallation form supporting not detracting from the bag's structural reliability.
Mounting transversely not fore/aft supported potentials for more bags nearer the seating, centered to seating weight desirable in the designer's intentions.
The bags are used as variable water ballast then drinking water. We have an available local long trip from here to Key West or St Marks southward in the panhandle.
I'm pleased with ballast functions and keel weight to roll up from upside down. And look toward drinking water in bag not on hull when we get there.
You cannot drink BB's.
Masking the bag. Cut a rectangle of shirtbox cardboard...eg Cliff Bar boxing slightly larger than the intended velcro patch.
Place the rectangle on filled Drom, masking tape around that perimeter. Then cut a rectangular hole in a white 13 gallon garbage bag with the velco cardboard template. Tape bag to the filled bag's masked rectangle.
Spray on a good coat, outside, downwind wearing a mask. Let the 76 bonds sit in a warm area for 36 hrs before testing with a careful pulloff. Don't yank the patch, gently tug at it.
If the bond tugs loose with grippy cheeselike stuff inbetween itsa do over.
The keel weight function is available for hi volume tripping kayaks used for general paddling: weight is down there where it belongs and adjustable.