Built from plans by Excelsiorrocketry.com usein' 2 Baby Bertha kits, 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. Begad! Total investment: approx. Aye aye! $45.00 makin' it a very expensive kit bash but worth it for t' looks I get at t' field. Avast! Always a head turner.