Tekin 1/8 Scale controller release date?

I too waould like to put one of these on order but I am wondering which motor is correct for my application. I have a Losi 8ight converted to an 8e cirrently using a Medusa mr-036-060-2000v2-5 motor mamba max esc and Thunder Power 4s 50000 14.8v lipo. I am using the losi plastic 45t spur and Robinson 12t pinion. I cannot get this system to start smoothly and want to go with a sensored system. Which motor and gearing combo is recommended. I run mostly on a small backyard track. Thanks.