One suggestion. I have personally found that just having a blinky light on the rear all by itself doesn't work that well. The reason being is that it is very difficult for the human eye to "lock onto" a blinking light source in order to correctly judge the distance, direction, and speed of the object (in this case an M-bike) that has just a blinky light. I have had much better results by using a combination of a solid on light in combination with a blinky light on the rear. Preferably with the solid on light about twice as bright as the blinky with the blinky separated by about a foot distance from the solid on light (usually with the blinky a foot or so above the solid on).
The blinky gets their attention so they see you and then the solid on light gives them something for their eyes to “lock onto” to judge your distance, direction, and speed. Works better for me then just a blinky in traffic after dark for cars coming from behind giving me more room and respect.