diff --git a/beautiful-racket/br/demo/hdl/bus.rkt b/beautiful-racket/br/demo/hdl/bus.rkt
index 4858a96..e72b74f 100644
--- a/beautiful-racket/br/demo/hdl/bus.rkt
+++ b/beautiful-racket/br/demo/hdl/bus.rkt
@@ -33,7 +33,7 @@
   (reverse (for/list ([i (in-range width)])
                      (bitwise-bit-field int i (add1 i)))))
 
-(define max-bus-width 16)
+(define max-bus-width 64)
 (define default-bus-width 1)
 
 
@@ -116,7 +116,7 @@ base bus:
               (raise-argument-error 'id (format "bus width <= max width ~a" max-bus-width) bus-width))
             (impersonate-procedure
              (let ([reader (make-bus-reader 'id bus-width)])
-               (procedure-rename (λ args (apply reader (ID-THUNK) args)) (string->symbol (format "~a, a bus of width ~a" 'ID bus-width))))
+               (procedure-rename (λ args (apply reader (ID-THUNK) args)) (string->symbol (format "~a:~a-bit" 'ID bus-width))))
              #f BUS-TYPE #t)))
         #,(when (syntax-property caller-stx 'writer)
             (with-pattern
diff --git a/beautiful-racket/br/demo/hdl/tokenizer.rkt b/beautiful-racket/br/demo/hdl/tokenizer.rkt
index 0ba1cef..25a350d 100644
--- a/beautiful-racket/br/demo/hdl/tokenizer.rkt
+++ b/beautiful-racket/br/demo/hdl/tokenizer.rkt
@@ -18,8 +18,9 @@
        [(char-set "[]{}(),;=.") lexeme]
        ["true" (token 'TRUE #t)]
        ["false" (token 'FALSE #f)]
-       [(repetition 1 +inf.0 (char-set "01")) (token 'BINARY-NUMBER (string->number lexeme 2))]
        [(repetition 1 +inf.0 numeric) (token 'NUMBER (string->number lexeme))]
+       ; bugaboo: "10" is ambiguous: number or binary number?
+       [(repetition 1 +inf.0 (char-set "01")) (token 'BINARY-NUMBER (string->number lexeme 2))]
        [(seq (repetition 1 1 alphabetic) (repetition 0 +inf.0 (union alphabetic numeric "-"))) (token 'ID (string->symbol lexeme))]))
     (get-token input-port))  
   next-token)