hey no problem, by the time i was done writing that i was confused. if you check rc driver or extreme rc cars back issues, one of them had a great online article about enlarging your ports using a dremmel tool. i have used this before and have since ported several engines, if you ever have any ?s you can pm m if you would like i will also see if i can find that article for you it is acouple of years old maybe someone reading this has read the same artilcle and could help, kman