yes it is .

is this group anymore active?

Try my Compact Crane, its old, buts its no-where close to being weak, the only weak parts are
useless, and are used for the sake of trying to keep it on the floor, which isnt even that useful, since its based on the mass of the object (It can with little trouble hold the giant crystal in Tolbrynd) The only thing that I want to add now is bombs, so it can compleat nerly every level (The only level it may need a major upgrade to compleat is the Marksmans Pass)

-a sports car
-cannon
-accurate missile
-rocket
-plane ;)
-a tank
-a npc trap
-teapot
-catapult
-trebuchet
-slingshot
-helicopter
-0 grav space ship
-a vehicle that can complete ipsilon
-a vehicle that can complete tolbrynd
-try to recreate a workshop creation (without downloading it ;))
-a clock (each hour is a minute)
-a walker
-a machine or something form a movie
-harness the rockets and use them in one of your older creations (if you have any)
-make a cool scene using cameras
-make a large building that can hold lots of weights
-create a skyscraper
-make a crane
-make the internals of a revolver or gun
-a firework display
-a minigame like pinball or basketball
-peasant cannon

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that's pretty much all that I can think off, happy building Besiegers!