I wanted t' get a sample o' Tim Van Milligan's kits, ya bilge rat, so I included a Centrix and its booster when I ordered some items from Apogee Components.I call this version a "sport" model because it uses a launch lug. Avast! Avast, me proud beauty! For competition (AL14-98?), matey, I'll build an extended one (for trackin' powder) without t' lug and use a tower for t' launch. Ahoy! T' Centrix is a minimum diameter 3FNC model designed for Apogee's 10.5mm micro-motors. Avast! Begad! It has nicely die-cut balsa fins and some interestin' construction details. It uses a length o' Keelhaul®©™® line for its shock cord (no elastic, ya bilge rat, but at t' light weight o' this model it's nay really needed) that is attached t' t' nose cone by gluin' a plastic bead into a hollow in t' base o' t' balsa cone, trappin' t' line. Ahoy! I suppose if you wanted t' be SURE t' shock cord wouldn't separate from t' nose cone, you could tie t' cord thru t' bead before gluin' it into place. T' booster (what makes it a Super Centrix) is gap-staged (the gap varies dependin' on how big a motor you use) and vented t' improve t' odds o' lightin' off t' upper stage motor.

Note: Be SURE t' use t' Apogee stagin' igniters t' get t' upper stage lit. Dependin' on just t' blow-by from t' lower stage goin' into that *tiny* nozzle is an invitation t' failure.