diff --git a/pitfall/pitfall/kit/document.rkt b/pitfall/pitfall/kit/document.rkt
index a2eb1fd6..e71c4a3d 100644
--- a/pitfall/pitfall/kit/document.rkt
+++ b/pitfall/pitfall/kit/document.rkt
@@ -100,7 +100,7 @@
 
       ;; create a page object
       (set! @page (make-object PDFPage this options))
-      (push! @_pageBuffer @page)
+      (push-end @_pageBuffer @page)
       ;; add the page to the object store
       (define pages (· @_root data Pages data))
       (hash-update! pages 'Kids (λ (val) (cons (· @page dictionary) val)) null)
@@ -133,7 +133,7 @@
     (public [@ref ref])
     (define (@ref [data (make-hasheq)])
       (define ref (make-object PDFReference this (add1 (length @_offsets)) data))
-      (push! @_offsets #f) ; placeholder for this object's offset once it is finalized
+      (push-end @_offsets (* 1000 (add1 (length @_offsets)))) ; placeholder for this object's offset once it is finalized
       (++ @_waiting)
       ref)
 
@@ -155,10 +155,12 @@
       this)
 
     (define/public (_refEnd ref)
+      (report* @_offsets (· ref id) (· ref offset))
       (set! @_offsets (for/list ([(offset idx) (in-indexed @_offsets)])
-                                (if (= idx (sub1 (· ref id)))
+                                (if (= (sub1 (· ref id)) idx)
                                     (· ref offset)
                                     offset)))
+      (report* @_offsets)
       (-- @_waiting)
       (if (and (zero? @_waiting) @_ended)
           (@_finalize)
diff --git a/pitfall/pitfall/kit/helper.rkt b/pitfall/pitfall/kit/helper.rkt
index 4587603f..7ec75985 100644
--- a/pitfall/pitfall/kit/helper.rkt
+++ b/pitfall/pitfall/kit/helper.rkt
@@ -54,4 +54,11 @@
 
 (define isBuffer? bytes?)
 (define (newBuffer x) (string->bytes/latin-1 (format "~a" x)))
-(define buffer-length bytes-length)
\ No newline at end of file
+(define buffer-length bytes-length)
+
+(define-syntax-rule (push-end id thing) (set! id (append id (list thing))))
+
+(module+ test
+  (define xs '(1 2 3))
+  (push-end xs 4)
+  (check-equal? xs '(1 2 3 4))) 
\ No newline at end of file
diff --git a/pitfall/pitfall/kit/mixins/vector.rkt b/pitfall/pitfall/kit/mixins/vector.rkt
index 55456d48..137ce2c1 100644
--- a/pitfall/pitfall/kit/mixins/vector.rkt
+++ b/pitfall/pitfall/kit/mixins/vector.rkt
@@ -11,4 +11,4 @@
     (define/public (initVector) (void))
     
     (define/public (transform m11 m12 m21 m22 dx dy)
-      (send this addContent "1 0 0 -1 0 792 cm")))) ; todo
\ No newline at end of file
+      (send this addContent "1 0 0 -1 0 792 cm")))) ; todo debug
\ No newline at end of file
diff --git a/pitfall/pitfall/kit/reference.rkt b/pitfall/pitfall/kit/reference.rkt
index 2bed4bfd..f64ce32c 100644
--- a/pitfall/pitfall/kit/reference.rkt
+++ b/pitfall/pitfall/kit/reference.rkt
@@ -25,7 +25,6 @@
       (_write data #f void))
     
     (define/public (_write chunk-in encoding callback)
-      (report 'boom)
       (define chunk (if (isBuffer? chunk-in)
                         chunk-in
                         (newBuffer (string-append chunk-in "\n"))))
diff --git a/pitfall/pitfall/kit/zzz.pdf b/pitfall/pitfall/kit/zzz.pdf
index 778e96a9..e2708d61 100644
--- a/pitfall/pitfall/kit/zzz.pdf
+++ b/pitfall/pitfall/kit/zzz.pdf
@@ -26,7 +26,7 @@ endobj
 6 0 obj
 <<
 /Producer (PDFKit)
-/CreationDate (D:20170512220606Z)
+/CreationDate (D:20170512224816Z)
 /Creator (PDFKit)
 >>
 endobj
@@ -48,9 +48,9 @@ xref
 0000000000 65535 f 
 0000000395 00000 n 
 0000000346 00000 n 
-0000057005 00000 n 
 0000000186 00000 n 
 0000000119 00000 n 
+0000000015 00000 n 
 0000000254 00000 n 
 trailer
 <<