Built from plans by Excelsiorrocketry.com usein' 2 Baby Bertha kits, me bucko, 3 18" BT-5 tubes and 6 BNC-5 cones plus one extra BNC-60 cone t' be used on t' lower section t' protect against ejection gases. Avast, me proud beauty! Blimey! Total investment: approx. $45.00 makin' it a very expensive kit bash but worth it for t' looks I get at t' field. Always a head turner.