Well I know I am way over servoed but this is what I am running in mine... I have HS645 MG 's in everything but the throttle and in the throttle I have a DS821 ... I have a AR7000 reciever . I could easily get by with Hi -Tec 425 BB I think because this is a Cub and if you fly it like a Cub they are pretty gentalflying planes...DS821's are a fairly good choice if you want digital ...I have had About 10 821's in a few of my planes and they work great...Strong trouble free...I have heard that digital's use more juice than anilog but with the batteries they have nowadays you don't need to worry about that...