Knex Auto Axe

I saw a picture of the fallout 3's auto axe on knex innovation someone had an idea to build it but I tried it and this is what came out of it

I wont be making Instructable because it dismantled but should be able to make it from pictures there is quiet alot of pieces in it

pic 1 the real one
pic 2 side
pic 3 internals
pic 4 other side
pic 5 front handle battery box and control
pic 6 front looks beafy
pic 7 bottom of the internals
pic 8 main blade
pic 9 small blade which goes onto of big blade