WOW, afer reading every word on every page on this forum about the EX-TECH .21....i'm really considerin gettin one to run in my 8T and Xray XB8. this engine seems to have everything u want...and ALOT more. I believe i might have to take a stroll up to my LHS tomorrow and tell them to order it for me. CANT WAIT~!@~!@~@~!@