Laravel 4.2 Pagination on New Collection Doesn't Work As Expected

I created a new Collection, paginating as one would and passing it to the view. But there's one problem. The pagination works as expected on page 1, but when I press next, it goes on page 2, but there's no content there, nor the pagination links. The code is as above.

        //pull all threads ordered by decreasing date
        $all_threads = Thread::orderBy('updated_at', 'DESC')->paginate(30);

        $new = $all_threads->each(function($thread)
        {

            $upvotes = $this->vote->count_upvotes('thread', $thread->id);

            $downvotes = $this->vote->count_downvotes('thread', $thread->id);

            $thread->score = $this->feedranker->threadScore($thread->created_at->diffInDays(), $upvotes - $downvotes);
        });

        $collection = $new;

        // Paginate
        $perPage = 3; // Item per page (change if needed)

        $currentPage = Input::get('page') - 1;

        $pagedData = $collection->slice($currentPage * $perPage, $perPage)->all();

        $collection= Paginator::make($pagedData, count($collection), $perPage);