Pictures of my modded Reactor 4000's.  Narrow butterfly rely on blocks to close.  Quick Edit: Mods done: TGC Spec Bauer Reactor 4000. 34+2 Kept top strap to close the 5 hole better. The knee cradle was stitched in, but I unstitched it and cut out the landing piece, to be used with the knee block. Stiffened the knee landing piece with plastic for better sliding.  Monster 45 Degree knee blocks w/ maltese. Heavy duty Nylon webbing strap on plastic buckle.  Removed t