suggestion to add dynamic compound object to the physics engine as suggested here
http://www.purebasic.fr/english/viewtop ... 16#p420712
which refers to here http://bulletphysics.com/Bullet/BulletF ... ml#details
this is to combine a number of smaller primitives into one big physics collision body. the AttachEntityObject does not keep the collision physics so may be the above suggestion solve this.