I have been using the Kavan geared with a 2200mAh LiPo since 2007, that thing turns a DA50 like an OS46, I never had a problem starting all my YS, we have used my starter to start all YS powered aircraft in one day of competition practice without recharging, I strongly recommend that set up as it is the most powerful and compact of all setups. SIG is the USA dealer and have all part if ever needed and is cheap.

regards