Velcro Rockets is an addon by Erik Anderson, aka Sputnik. It allows, through a config system, to build a specific rocket stage. Multistaging is done in the .scn file. Velcro Rockets also relies on CVEL GDPS. Velcro Rockets is currently at Version 1.1
There have been expansions to Velcro rockets, including: Velcro Saturns (v. 1.11) Velcro EELVS (v. 1.02) Velcro NEXUS (v. 1.0) Velcro N-1 (v. 1.0) Velcro Skybolt (v. 1.0) Velcro NOTSNIK (v. 1.01).
With Velcro rockets, a vessel can be attached as a, parallel stage, a crossfeeding stage and a in-line stage. Stages can also be attached using CVEL.
-Stages will ignite spontaneously at high time accelerations
-After being edited with the scenario editor, all velcro stages in the scenario might put out limited thrust only.
-Sometimes after being switched to from another vessel, the stage will put out limited thrust only.