Transformers Exclusive ROTB / Bumblebee Movie Energon Igniters 2 Pack Video Review

At roughly $15/each, aren't the figures from the original line cheaper?

I have a similar affinity to the igniters line and was pleasantly surprised at potential extensions.
Power of the Primes: Evolutionary Optimus Prime can sort of wedge a motor in vehicle mode between the truck bed.

War for Cybertron Kingdoms: Tracks/Road Rage have a shallow post where their bolt "tailpipe" lies to insert their twin missiles in robot mode that can functionally also hold an igniter motor (depending on the motor; some designs have too much bulge above the peg to allow the motor to fit flush).

I do hope there are others (that don't need adjusting) that can also utilize the motor. It really is a fun desk toy.

Forgot to add (if my previous post gets approved in chronological order) the spinning notch in the back of the Igniter engine is a bit sensitive, if anything were to expand it that impairs the spinning, the entire engine locks.