We’re nearly half way through TLCB Lock-Down B-Model Competition, where we’re looking for your awesome set alternates the could win you an incredible SBrick Pro Pack!

This is Tomik’s of Eurobricks entry, using the Technic 42075 First Responder set to create an alternate which unusually switches wheels for rotors, and includes one of the most ingenious hand-operated mechanisms we’ve seen yet!

Tomik’s ‘Pull-Back Helicopter’ uses the shock-absorber from 42075’s suspension to store energy from winding a gear, releasing it to simultaneously turn both the main and tail rotor. It’s a mighty clever use for the humble shock-absorber and it makes us think LEGO’s own Pull-Back efforts, derided upon their release here every year, are even weaker.

An opening cockpit is also included and there’s more to see of Tomik’s B-Model competition entry at the Eurobricks forum – click here link to see more – including a video of the ‘pull-back’ mechanism in action – and here to find out how to enter your own B-Model into the contest!