Goblin

Estes goblin is a great rocket, but a wee bit under engineered, for my taste. 1st-It needs a slotted BT-55 body tube for though tube wall fins. 2nd-Though tube fins to the BT-50 engine mount. 3rd-Upgrade paper centering rings to plywood and internal ribs, made out of resin impregnated balsa, parallel to the fins, like internal gussets. It doesn't add that much weight to tail end of this kit, so not much more weight will have to added to the nose cone. 4th-Use epoxy!!! 5th-Add an ejection baffle, by extending the engine tube or, in the BT-55. 6th-Add a parachute with a spill hole, instead of 2 streamers. 7th-Upgrade rubber shock cord to nylon, or Kevlar and attach to centering rings. 8th-Since it's distant larger cousin,(DRM), Der Red Max was made, by Estes, into, (DBRM), Der Big Red Max, so why not swap to a full length BT-55 18 slotted body tube, instead of half, for an XL-Goblin. This would make it easier to modify, for the longer, higher grain cases either 24mm, or 29mm. If you have a really small field, there's a cluster mod for 4x13mm motors, using A10-3's and taking it to about 350 feet of altitude. I wouldn't fly it on anything less. Over all, the Estes Goblin is a must have for any rocket enthusiast.